Embed Size (px)
Citation preview
Host ID
/etc/vx/volboot file contains the host ID that was on the system when we installed VxVM.
To Change the hostname in the volboot file use the command
#vxdctl hosted newhostname
Default Boot Disk Group
To display what is defined as the default boot disk group
#vxdg bootdg
Display what is defined as the default disk group
#vxdg defaultdg
Set default disk group after VxVM installation.
#vxdctl default diskgroup_name
View Attributes of a disk group
#vxassist –g disk_group_name help showattributes
View basic information about all disks
#vxdisk –o alldgs list
Rescan for disk group changes
#vxdctl enable
Page 1 of 56
Display summary of all disks
#vxdisk –s list
Detailed information for disks
#vxdisk –g disk-group_name list disk_media_name
Example
#vxdisk –g datadg list datadg01
Display free space in a disk group
#vxassist –g disk_group_name help space
#vxdg –g disk_group_name free
Page 2 of 56
Disk Configuration Stages
1. Disk drive is initialized2. Disk is placed in disk group3. Create volume from disk
Example
1. Disk drive is initialized#vxdisksetup –i c0t0d0
2. Initialize disk group by adding at least one disk.#vxdg init diskgroup_name disk_media_name=disk_access_nameExample#vxdg init newdg newdg01=c0t0d0Another example to add another disk in an existing group.#vxdg –g diskgroup_name adddisk disk_media_name=disk_access_nameExample#vxdg –g newdg adddisk newdg02=c0t0d1
3. Create a Volume#vxassist –g diskgroup_name make volume_nameExample#vxassist –g datadg make datavol 10g
Page 3 of 56
To create volume of specific size on specific disks
Example
#vxassist –g datadg make datavol 10g datadg01 datadg02
To create stripped volume on specific disks
#vxassist –g datadg make datavol 10g layout=stripe ncol=3 stripeunit=25k datadg01 datadg02 datadg03
Evacuate Data from one disk to another
#vxevac –g disk_group_name from_disk to_disk
Example
#vxevac –d datadg datadgg02 datadg03
Evacuate Data from one disk to another disk except a particular disk.
#vxevac –g disk_group_name from_disk !not_on_disk
Example
#vxevac –d datadg datadgg02 !datadg03
Page 4 of 56
Remove a Disk from VxVM Control and Uninitialize it
Step 1
#vxdg –g disk_group_name rmdisk disk_media_name
Example
#vxdg –g datadg rmdisk datadg02
Step 2
#vxdiskunsetup device_tag
Example
#vxdiskunsetup c0t0d0
Rename a Disk
#vxedit -g disk_group_name old_disk_name new_disk_name
Example
#vxedit –g datadg datdg02 datadg01
Page 5 of 56
How to remove a disk from VxVM
#vxdisk rm disk_access_name
How to remove a disk from VxVM control
#/usr/lib/vxvm/bin/vxdiskunsetup disk_access_name
Example
#/usr/lib/vxvm/bin/vxdiskunsetup ct1t1d2
How to move volumes from a disk
Example
If you want to remove volumes from a disk mydg02 and move it on to any other disk, use the command.
#vxassist move volume_name \!mydg02
Page 6 of 56
Deport a Disk Group
#vxdg deport disk_group_name
Example
#vxdg deport datadg
Deport a Disk Group and Rename It
#vxdg –n new_disk_group_name deport old_disk_group_name
Example
#vxdg –n datadg deport olddg
Deport a Disk Group and Rename New Host Owner
#vxdg –h new_host_name deport disk_group_name
Example
#vxdg –h newhost deport datadg
(Note unmount a Diskgroup before Deporting it)
Import a Disk Group
#vxdg import disk_group_name
Example
vxdg import datadg
Import a Disk Group and Rename
Page 7 of 56
#vxdg –n new_disk_group_name import old_disk_group_name
Example
#vxdg –n newdg import olddg
Destroying a Disk Group
#vxdg destroy disk_group_name
Example
#vxdg destroy olddg
(Note:Destroying a diskgroup places all its disks in a free disk pool in an uninitialized state)
Displaying a Volume Information
#vxprint –g disk_group_name –ht | more
Example
#vxprint –g datadg –ht | more
Create Simple Concactenated Mirrored Volume (Non-Layered)
#vxassist –g disk_group_name make volume_name layout=mirror-concat
Example
#vxassist –g datadg make datavol 10g layout=mirror-concat
Create Simple Stripped Mirrored Volume (Non-Layered)
Example
Page 8 of 56
#vxassist –g datadg make datavol 10g layout=mirror-stripe
Creating a Mirrored Volume
#vxassist -g disk_group_name make volume_name size layout=mirror
Example
#vxassist –g datadg make datvol 10g layout=mirror
Another Example
vxassist –g datadg –b make datavol 10g layout=mirror
Starting Volumes in a DiskGroup After Importing
#vxvol -g disk_group_name startall
Example
#vxvol –g datadg startvol
Determine largest possible Size of a volume
#vxassist –g diskgroup maxsize attributes
Example
#vxassist –g datadg maxsize layout=raid5
Determine how much a volume can expand
#vxassist –g disk_group_name maxgrow volume_name
Example
Page 9 of 56
#vxassist –g datadg maxgrow datavol
Page 10 of 56
How to Remove a Volume
1. Unmount the File System 2. Edit /etc/vfstab or /etc/fstab file to remove entry3. #vxassit –g disk_group_name remove volume volume_name
Example#vxassist –g datadg remove volume datavol
Page 11 of 56
How to Mirror a Volume
#vxassist –g disk_group_name mirror volume_name [layout=layout_type] [disk_name]
Example
#vxassist –g datadg mirror datavol datadg02
Where datadg02 is the disk_media_name on which mirror is being created.
How To Remove a Mirror From a Volume
Example
In this example remove the plex that contains the subdisk, that is part of a disk. State the disk name with an exclamation point before disk name.
#vxassist –g datadg remove mirror datavol !datadg02
Another Example
This method uses the plex to be removed
#vxplex –g disk_group_name –o rm dis plex_name
Volume Read Policies
How to Add DRL (Dirty Region Log)
#vxassist –g disk_group_name addlog volume_name [logtype=drl]
Example
#vxassist –g datadg addlog datavol logtype=drl
Page 12 of 56
How to Add DRL (Dirty Region Log) in RAID 5 Volume
#vxassist –g disk_group_name addlog volume_name
Example
#vxassist –g acctdg addlog datavol
(Note in RAID 5 we do not need to mention log type)
Volume Read Policies
1. Round Robin2. Preferred3. Selected (default)
Example
To select the read policy to round robin.
#vxassist –g datadg rdpol round datavol
To select the read policy to be preferred
#vxassist –g volume_group_name rdpol prefer volume_name plex_name
#vxassist –g datadg rdpol prefer datavol datavol-02
To select the read policy to “Selected”
#vxassist –g group_name rdpol select volume_name
#vxassist –g datadg rdpol select datavol
How to create volume on a particular disk
Page 13 of 56
#vxassist –g disk_group_name make volume_name size media_name
Example
#vxassist –g mydg make vol23 20m mydg03
How to Rename a Disk
#vxedit –g diskgroup rename old_disk_name new_disk_name
How to rename a disk so that it is not used for allocating space unless specifically stated on command line?
#vxedit –g diskgroup_name set reserve=on disk_name
How to turn off reservation on a disk?
#vxedit -g diskgroup_name set reserve=off disk_name
How to display free space for a disk group
#vxdg –g diskgroup_name free
Example
#vxdg –g mydg free
Page 14 of 56
How to Create a new mirrored volume using selected disks
In the below example we have to create a new volume (mirrored) using selected disks.
1. First, initialize the disk#vxdiskset –i disk_access_name
Example
#vxdisksetup –i c0t1d0
#vxdisksetup –i c0t2d0
2. Initialize the disk group by adding disks.
#vxdg init disk_group_name media_name=media_access_name
Example
#vxdg init datadg datadg01=c0t1d0
Example
#vxdg –g datadg adddisk datadg02=c0t2d0
3. Create a Mirrored Volume Using these 2 Disks.
#vxassist –g disk_group_name make volume_name layout=mirror media_name media_name
Example
Page 15 of 56
#vxassist –g datadg make datavol layout=mirror datadg01 datadg02
3a. Create a Mirrored Volume Using these 2 Disks with ordered allocation.
#vxassist –g disk_group_name –o ordered make volume_name size layout=mirror media_name media_name
Example
#vxassist –g datadg –o ordered make datavol 2g layout=mirror datadg01 datadg02
Page 16 of 56
Resizing Volumes using vxresize command and vxassist command
Examples
Define new volume size
#vxresize –g datadg datavol 50m
Add space to a volume
#vxresize –g datadg datavol +10m
Reduce certain space from a volume
#vxresize –g datadg datavol -10m
Specify new volume size increased
#vxassist –g datadg growto datavol 40m
Increase Volume Space by Certain Amount
#vxassist –g datadg growby datavol 10m
Reduce Volume Space by certain Amount
#vxassist –g datadg shrinkby datavol 10m
Specify new volume size reduced
#vxassist –g datatdg shrinkto datavol 30m
Determine how much free space is in a disk group
Page 17 of 56
#vxdg –g group_name free
Example
#vxdg –g datadg free
Determine how much free space is in a volume
Example
#vxassist –g datadg maxgrow datavol
How to display extended device attributes?
#vxdisk –p list
and
#vxdisk -x attribute –p list
and
#vxdisk –x DDL_DEVICE_ATTR –p list
and
#vxdisk –e list
How to resize a VxFS file System
1. First, determine the amount of free space available in a disk group.
Page 18 of 56
Example
#vxdg –g datadg free
2. Second, increase the size of the volume.
Example
#vxassist –g datadg growto datavol 1024000
3. Next expand the file system (VxFS)
Example
#fsadm –b 1024000 –r /dev/vx/rdsk/datadg/datavol/datavol /datavol
4. Lastly, verify new expanded size.
#df –k /datavol
(Note: File system is mounted during expansion)
How to Display File system Type
Example
Page 19 of 56
#fstype –v /dev/vx/dsk/datadg/datavol
In Solaris Environment How to Create VxFS File System
Example
#mkfs –F vxfs /dev/vx/rdsk/datadg/datavol
#mkdir /data
Mount the File System
#mount –F vxfs /dev/vx/dsk/datadg/datavol /datavol
In Solaris Environment How to Create UFS File System
Example
#newfs /dev/vx/rdsk/datadg/datavol
Create mount point
#mkdir /data
Mount File System
#mount /dev/vx/dsk/datadg/datavol /datavol
Page 20 of 56
In Linux Environment How to Create VxFS File System
#mkfs –t vxfs /dev/vx/rdsk/datadg/datavol
Create a Mount Point
#mkdir /data
Mount the File System
#mount –t vxfs /dev/vx/dsk/datadg/datavol /data
Page 21 of 56
How to find what is the server’s default file system
For Solaris and linux it is listed in /etc/default/fs
In Solaris what fle systems cannot use VxFS
1. /2. /usr/3. /var4. /opt
In Solaris what is the location of VxFs Commands
/opt/VRTSvxfs/bin
/usr/lib/fs/vxfs
/etc/fs/vxfs
Page 22 of 56
In LINUX what file systems cannot use VxFS
1. /2. /boot3. /etc4. /lib5. /var6. /usr
In LINUX what is the location of VxFS Commands
1. /sbin2. /usr/lib/fs/vxfs
How to display file system layout versions
#vxupgrade /mnt
How to upgrade file system version
Example
To upgrade file system layout version from 4 to 6
#vxupgarde –n 5 /mnt
#vxupgrade –n 6 /mnt
Veritas File System Fragmentation Types
1. Directory Fragmentation2. Extent Fragmentation (File Fragmentation)
To monitor directory fragmentation
Page 23 of 56
Example
#fsadm –D /mnt1
To monitor extent fragmentation
Example
#fsadm –E /home
How to defragment Directory
#fsadm –d –D /mnt1
How to defragment Extent
#fsadm –e –E –s /mnt1
How to Run fsck Command with and without intent Log
Example
To perform a full file system check without intent log
#fsck [fs-type] –o full,nolog /dev/vx/rdsk/datadg/datavol
Example
To perform file system check with intent log
#fsck [fs-type] /dev/vx/rdsk/datadg/datavol
Perform Parallel file system check with intent log on 2 file systems in parallel
#fsck [fs-type] –o –p /dev/vx/rdsk/c1t2d0s4 /dev/vx/rdsk/c1t0d0s5
Page 24 of 56
How to Create a Snapshot volume
Example
First start creating “snapshot” of the original volume.
#vxassist 0g datadg –b snapshot datavol
Next create the snapshot volume
#vxassist –g datadg snapshot datavol snapvol
How to refersh data from original volume to snapshot volume.
#vxassist –g datadg snapback snapvol
How to refresh data from snapshot volume to original volume
Example
#vxassist –g datadg –o resyncfromreplica snapback snapvol
How to Create Completely Independent volume from Snapshot.
Example
#vxassist –g datadg snapclear snapvol
How to permanently destroy a snapshot volume
#vxassist –g datadg remove volume snapvol
How to Create a File System Snapshot
#mount –F vxfs –o snapof=/original_file_system, snapsize=size destination destination_mount_point
Example
Page 25 of 56
#mount –F vxfs –o snapof=/fs01,snapsize=32768 /dev/vx/dsk/datadg/snapvol /snapvol
How to Remove a File System Snapshot
Example
#umount /snapmount
How to Configure a spare Disk
To mark a disk as spare
1. Initialize the disk
#vxdisksetup –i c1t0d1
2. Assign the disk to a disk group and give it a disk media name.
#vxdg –g datadg adddisk datadg=c1t0d1
3. Mark the disk as spare
#vxedit -g datadg set spare=on|off datadg01
How to Prevent a disk’s space from being used for hot relocation
Example
If we donot want space for subdisks to be used from disk datadg02 in that group.
#vxedit –g datadg set nohotuse=on|off datadg02
Page 26 of 56
How to use a disk as a replacement disk if it already is in a disk group?
To use a disk as a replacement disk for disk that has failed the replacement disk should be in a free disk pool but CANNOT belong to a disk group.
Example
#vxdg –g datadg rmdisk datadg01
(Now the disk is initialized, but does notbelong to a disk group)
Steps to replace a failed Disk
1. Physically replace the bad disk.2. New disk should be recognized by the Operating System.
Example#devfsadm –c C disk
3. Have Veritas recognize existence of the new drie.#vxdctl enable#vxdisk list
4. Initialize the new disk#vxdisksetup –i c1t1d0
5. Add the disk #vxdg –k –g datadg adddisk datadg01=c1t1d0(Where ‘k’ forces c1t1d0 to take datadg01 as its disk media name, datadg01 is the name of the failed disk)
How to unrelocate a Disk.
#unrelocate -f –g [diskgroup] –t task_tag –n disk_name orig_disk_name
Example
#unrelocate -f –g datadg –n newdatadg01 orig_datadg01
How To Recover a Volume
Page 27 of 56
When veritas loses contact (e.g if a fibre cable is removed between a server and a storage array) with an active device, verits will place the device in a failed state. When situations like this arise, vxreattach utility can be used to reconnect veritas to lost devices.
#vxreattach –c <-This would see if relocation is possible. If it is possible the proceed to next step)
#vxreattach –r datadg01
To bring the volume back on line
#vxrecover –b –g diskgroup_name volume_name
Example
#vxrecover –b –g datadg datavol
What disks have configuration database
To find out which disks in a disk group have configuration database use the command.
#vxdg list diskgroup_name
How many disk types are there?
1. auto2. cds (suitable for moving from one host to another)3. sliced (For boot disks, not suitable for moving)4. none
How to convert a non-cds disk type to cds disk type.
#vxcdsconvert
Page 28 of 56
How to control vxconfigd
#vxdctl enable
#vxdctl mode
#vxdctl disable
#vxdctl stop
#vxconfigd
#vxdctl support
How does Volume Manager establishes ownership of physical disks?
The Host ID that is used by VxVM to establish ownership of physical disks is listed in /etc/vx/volboot.
How to display contents of /etc/vx/volboot
#vxdctl list
How to change host ID in volboot file?
#vxdctl hostid new_host_id
How to Scan Operating System device tree after adding or removing LUNS (Solaris)?
1. Enter the following command#cfgadm –c configure c2(Where c2 is the controller 1D2)
2. Enter the following command#devfsadm –Cv
Page 29 of 56
How to make VxVM aware of the new size of a LUN that has been resized?
#vxdisk -f –g disk_group_name {access_name|media_name} [length=value]
How to list attributes of all HBA controllers on the system?
#vxdmpadm listctlr all
How to display TPD (Third Part Driver) which is monitored by DMP?
#vxdmpadm getsubpaths tpdnodename=third_party_node_name
Example
#vxdmpadm getsubpaths tpdnodename=emcpower10s2
and
#vxdmpadm getsubpaths tpdnodename=c7t0d10s2
Page 30 of 56
How to Scan for newly added devices previously unknown to VxVM?
#vxdisk scandisks fabric
How to scan for specific devices?
Example
#vxdisk scandisks device=c1t1d0.c1t2d0
How to list all controllers on a system?
#vxdmpadm listctlr all
How to check paths connected to a controller?
#vxdmpadm getsubpaths ctlr=controller_name
Example
#vxdmpadm getsubpaths ctlr=fscsi2
How to check paths connected to a LUN?
#vxdmpadm getsubpaths dmpnodename=device_access_name
Example
#vxdmpadm getsubpaths nodename=c3t2d1
How to disable I/O to a controller to perform maintenance
To disable I/O to a particular controller
#vxdmpadm disable ctlr=controller_name
How to enable I/O to a controller
Page 31 of 56
#vxdmpadm enable ctlr=controller_name
How to gather and display I/O statistics for paths
1.Enable the gathering of statistics.
#vxdmpadm iostat start [memory=size]
2.Reset, the I/O counters to zero
#vxdmpadm iostat reset
3.Display the accumulated statistics for all paths.
#vxdmpadm iostat show all
Page 32 of 56
Disk Errors
If the volume manager can access the provate region on the disk it marks the disk as FAILING. The plex with the effected subdisks is set with the IOFAIL condition.
If the volume manger cannot access provate region on the disk it marks the disk as FAILED. The plex with the effected subdisk is set with the NODEVICE state.
Page 33 of 56
How to replace a failed Drive.
1. First, physically replace the filaed drive.2. Recognize the replacement drive at the OS level
#devfsadm –c C disk3. Recognize the replacement drive at the Volume Manager level.
#vxdctl enable#vxdisk list
4. Initialize the replacement drive.#vxdisksetup –i c3t2d1
5. Add the replacement drive in the disk group and force it to have disk media name same as the failed drive.#vxdg –k –g datadg adddisk datadg02=c3t2d1
6. Recover the redundant volume (i.e if it is a mirrored volume with a failed plex)#vxplex –g diskgroup att volume_name plex_nameExmaple#vxplex –g datadg att vol01 vol01-02OrUse vxrecover command#vxrecover –g datadg –s datavol
7. Start any non redundant volume (Only Non-redundent volume)#vxvol -g datadg –f start vol02
8. Check data for consistency#fsck /dev/vx/rdsk/diskgroup_name/volume_nameExample#fsck /dev/vx/rdsk/datadg/vol02
Page 34 of 56
How to deal with intermittent disk failures
If the volume is redundant:-
Prevent read I/O from accessing the failing disk by changing the volume read policy. For example to prefer to read from plex vol01 -01instead of plex vol01-02
#vxvol –g datadg rdpol prefer vol01 vol01-02
Remove the disk. To forcibly remove the disk without relocating data
#vxdg –k –g diskgroup_name rmdisk disk_media_name
Example
#vxdg –k –g datadg rmdisk datadg02
Replace the disk
Set the volume read policy back to the original policy.
How to display plexes associated to a volume, and its state?
#vxinfo –p –g disk_group volume_name
Example
#vxinfo –p –g rootdg oraunix
To get more detailed information
#vxprint –g disk_group_name –ht volume_name
Example
#vxprint –g rootdg –ht oraunix
Page 35 of 56
How to change one plex of the volume to CLEAN state, so that other plexes copy data from that plex. Once data copy is completed bring the entire volume on line and fully operational?
#vxvol –g diskgroup init init_type volume_name plex_name
Example
#vxvol -g datadg init clean datavol datavol-02
Then do
#vxvol –g datadg init enable datavol
How to enable a volume
Example
#vxvol –g datadg init enable datavol
How to change the state of the plex?
#vxmend –g datadg fix stale dataplex
#vxmend –g datadg fix clean dataplex
#vxmend –g datadg fix active dataplex
How to take a plex offline?
#vxmend -g diskgroup_name off plex_name
How to make a plex online?
#vxmend -g diskgroup_name on plex_name
Page 36 of 56
How To recover a volume with Plex Problem
Example
Say, a volume has 2 plexes vol01-01 and vol01-02
vol01-01 is in DISBLED/RECOVER statevol01-02 is in DISABLED/STALE state
Since plex vol01-01 is in DISABLED/RECOVER state, its data is better than vol01-02 plexTo recover the volume in this case follow the steps.
1. Bring both the plexes to STALE state.#vxmend –g datadg fix stale vol01-01#vxmend –g datadg fix stale vol01-02
2. Next change the state of vol01-01 plex to clean#vxmend –g datadg fix clean vol01-01
3. Recover the volume#vxrecover –g datadg –s vol01
How to encapsulate a disk under VxVm Control
Page 37 of 56
#/etc/vx/bin/vxencp –g diskgroup –c media_access_name=disk_name
Example
#/etc/vx/bin/vxencp –g rootdg –c rootdg01=c0t0d0s2
Run The Script
#/etc/init.d/vxvm-reconfig access_name
Example
#/etc/init.d/vxvm-reconfig c0t0d0
Page 38 of 56
How to Mirror Root Disk in Solaris
Option 1
To mirror only those file systems on the root disk that are required to boot the system, run the command:-
#/etc/vx/bin/vxrootmir alternate_boot_disk
Example
#/etc/vx/bin/vxrootmir rootdg02
Option 2
To mirror all other unmirrored volumes on the boot disk to an alternate disk
#/etc/vx/bin/vxmirror –g disk_group_name boot_disk alternate_disk
Example#/etc/vx/bin/vxmirror –g rootdg rootdg01 rootdg02
#vxbootsetup
Page 39 of 56
How to Mirror Root Disk in LINUX
To mirror all file systems on the root disk, run the following command
#/etc/vx/bin/vxrootmir disk_access_name disk_media_name
Example
/etc/vx/bin/vxrootmir sdb rootmir
Page 40 of 56
Removing Boot Disk from VxVM Control (Solaris)
1. Ensure that boot disk volumes have only one plex.Example#vxprint -ht rootvol swapvol usr varIf the boot disk volumes have more than one plex each, remove unnecessary plexes.Example#vxplex –g bootdg –o rm dis rootvol02 swapvol02 homevol02
2. Run the vxunroot utility.#vxunroot
Page 41 of 56
Booting from an alternate mirror (Solaris)
To boot the system using an alternate boot disk after failure of the primary boot disk
1. Set the eeprom variable use-nvramrc? to trueExampleok>setenv use-nvramrc? trueok>reset
This variable must be set to “true” to enable the use of alternate boot disk.
2. Check for available boot disk aliases.ok>devalias
vx-rootdiskvx-diskname
The above command displays the name of the boot disk and available mirrors.3. Boot from an available boot disk alias
ok>boot vx-diskname
Page 42 of 56
Where is currently imported disk group stored?
/var/vxvm/tempdb directory is used to store configuration information
To remove and recreate the /var/vxvm/tempdb directory we can use the following command.
#vxconfigd –k –x cleartempdir
Page 43 of 56
How to create subdisks?
#vxmake –g diskgroup_name sd sub_disk_name disk_name , offset,length
Note Length=sectors
Example
#vxmake –g mydg sd mydg02-01 mydg02,0,8000
or
#vxmake –g mydg sd mydg02-01 mydg02 500m
How to Display information About subdisks?
#vxprint –st
How to display detail information about a particular subdisk?
#vxprit –g diskgroup_name –l subdisk_name
Example
#vxprint –g mydg –l mydg02-01
How To evacuate data from one subdisk to other subdisk/s?
Example
To move data off from subdisk mydg03-01 on to mydg12-01 and mydg12-02 subdisks, use the command.
#vxsd –g mydg mv mydg03-01 mydg12-01 mydg12-02
How to Split a subdisk?
Page 44 of 56
Example
To split subdisk mudg03-02 into 2 subdisks mydg03-02 and mydg03-04, use the command
#vxsd –g mydg –s 1000 split mydg03-02 mydg03-02 mydg03-04
How to Join subdisks
Example
Say we want to join 4 subdisks which are mydg03-02, mydg03-03, mydg03-04 and mydg03-05 into one subdisk mydg03-02, use the command.
#vxsd –g mydg join mydg03-02 mydg03-03 mydg03-04 mydg03-05 mydg03-02
How to create a plex and associate a subdisk with the new plex?
#vxmake –g diskgroup plex plex_name sd=subdisk_name
Example
#vxmake -g mydg plex plex-1 sd=mydg03-02
Page 45 of 56
How to associate subdisks to an existing Plex?
#vxsd –g disk_group assoc plex_name subdisk_name
Example
#vxsd –g mydg assoc plex-1 mydg03-03
How to dissociate a subdisk from a plex?
Example
#vxsd –g mydg dis mydg03-03
How to remove a subdisk from a disk group
#vxedit –g disk_group_name rm subdisk_name
Example
#vxedit –g mydg rm mydg03-03
How to create a plex?
#vxmake –g diskgroup_name plex plex_name sd=subdisk_name
Example
#vxmake –g mydg plex plex-01 sd=mydg02-01
How to create a concactenated Plex?
#vxmake –g disk_group_name plex plex_name sd=sub_disk1,sub_disk2
Example
Page 46 of 56
#vxmake –g mydg plex plex-01 sd=mydg02-01,mydg02-02
and also
#vxmake –g diskgroup plex plex_name layout=stripe stwidth=32 ncolumn=2 sd=subdisk1,subdisk2
Example
#vxmake –g mydg plex plex01 layout=stripe stwidth=32 ncolumn=2 sd=mydg02-01,mydg02-02
How to display information about plex?
#vxprint -lp
How to use detailed information about a plex?
#vxprint –g diskgroup –l plex_name
Example
#vxprint –g mydg –l plex01
How to List free Plexes?
#vxprint –pt
How to Attach a Plex to an existing Volume?
#vxplex –g diskgroup_name att volume_name plex_name
Example
#vxplex mydg att vol01 plex1
How to Create a New Volume by Attaching Plexes?
#vmake -g diskgroup_name –U usetype vol volume_name plex=plex_name
Page 47 of 56
Example
#vxmake –g mydg –U fsgen vol homevol plex=plex01
How to Take a Plex off-line?
#vxmend –g disk_group_name off plex_name
Example
#vxmend -g mydg off plex-02
How to detach one plex in a mirrored volume?
#vxplex –g diskgroup_name det plex_name
Example
#vxplex –g mydg det plex-02
How to bring a plex on-line
#vxmend –g diskgroup_name on plex_name
Example
#vxmend –g mydg on plex02
How to reattach a plex to a volume?
#vxplex –g diskgroup att volume_name plex_name
Example
Page 48 of 56
#vxplex –g mydg att home-vol plex-02
What if the volume is not startable?
If the vxinfo command shows that the volume is unstartablem set one of the plexes to CLEAN as follows.
#vxmend –g disk_group_name fix clean plex_name
Then start the volume using the following command
#vxvol –g diskgroup start volume_name
How to copy data from one plex to another plex?
#vxplex –g diskgroup_name mv original_plex_name new_plex_name
How to disassociate a plex from the associated volume?
#vxplex –g disk_group –o rm dis plex_name
Example
#vxplex –g mydg –o rm dis plex-02
or you can do it in 2 steps
step1 #vxplex –g mydg dis plex-02
step2 #vxedit –g mydg –r rm plex-02
Discovering maximum size of a volume
Find out how large a volume can you create within a disk group.
#vxassist –g diskgroup_name maxsize layout=layout_type
Example
Page 49 of 56
#vxassist –g oracledg maxsize layout=raid5 nlog=2
How To create a volume on any disk
#vxassist –b –g disk_group_name make volume_name length
Example
#vxassist –b –g oracledg make datavol 10g
How to create a volume on a specific disk/s?
#vxassist –b –g diskgroup_name make volume_name length disk_name
Example
#vxassist –b –g oracledg make datavol 10g oracledg01 oracledg02
How to Display Information About how a volume is configured?
#vxprint –g diskgroup –hrt
How to monitor a task?
#vxtask monitor
How to abort a task
#vxtask abort
How to list tasks
#vxtask list
How to pause/resume tasks
Page 50 of 56
#vxtask pause
#vxtask resume
How to stop all volumes in a diskgroup
#vxvol –g diskgroup –f stop volume_name
How to increase size of a volume
1. First determine how much you can increase a volume?#vxassist –g diskgroup maxgrow
2. Then increase the volume. For example to increase a volume from 1G to 10G using two disks use the command.#vxresize –g diskgroup –b –F vxfs –t tasktagname volume_name disk1 disk2
How to add mirror to a volume
#vxassist –b –g diskgroupname mirror volume_name
Example
#vxassist –b –g mydg mirror voltest
How to add mirror to a volume by creating a plex and the attaching it to a volume?
1. First initialize the disk.#vxdisksetup –i c0t0d1
2. Add the disk to diskgroup and give it a medianame#vxdg –g disk_group_name adddisk disk_media_name=disk_access_nameExample#vxdg –g mydg adddisk newdg02=c0t0d1
3. Create a subdisk#vxmake –g disk_group_name sd sub_disk_name disk_media_name size
Page 51 of 56
Example#vxmake –g mydg sd newdg02-1 newdg02 500m
4. Create a new plex and associate the subdisk.#vxmake –g disk_group_name plex plex_name sd=sub_disk_nameExample#vxmake –g mydg plex plex-01 sd=newdg02-1
5. Attach the plex to volume for mirroring.#vxples –g disk_group_name att volume_name plex_nameExample#vxplex –g mydg att voltest plex01
Page 52 of 56
How to mirror all volumes in a disk group
#/etc/vx/bin/vxmirror –g disk_group_name –a
To mirror only those file systems on the root disk that are required to boot the system (Solaris) use.
#/etc/vx/bin/vxmirror att_boot_disk_name
Example
#/etc/vx/bin/vxmirror bootdg02
How to mirror other file systems on the root disk?
#vxassist mirror volume_name alt_boot_disk_name
Example
#vxassist mirror homevol bootdg02
How to display native OS device name for a VxVM disk?
#vxdisk path | grep disk_media_name
Example
#vxdisk path | grep mydg02
How to Scan For disk devices previously unknown to the system?
Page 53 of 56
#vxdisk scandisk new
How to Obtain a list of physical controllers?
#vxdmpadm getctlr all
How to scan only for new devices added to the system?
#vxdctl –f enable
How to list all devices discovered by DDL?
#vxddladm list
How to list all host bus adapters (HBA’s)?
#vxddladm list hbas
How to list ports configured on an HBA?
#vxddladm list ports
How to list devices configured from an HBA?
#vxddladm list devices
How to identify the vendor ID and Product ID of disks in an array?
Page 54 of 56
#/etc/vx/diag.d/vxscsiinq /dev/rdsk/device_access_name
Example
#/etc/vx/diag.d/vxscsiinq /dev/rdsk/c1t20d0s2
How to display the relationship between the device paths, disk access names, disk media names and disk groups on a system?
#vxdisk path
How to view multipathing information for a particular device?
#vxdisk list c2t0d0s2
or
#vxdmpadm getsubpaths dmpnodename= c2t0d0s2
How to display multipathing information for a particular device including LUN serial number and array volume ID?
#vxdmpadm –v getdmpnode nodename=c0t50060160d0s2
How to get consolidated information for all DMP nodes in the system?
#vxdmpadm list dmpnode all
How to view multipathing information for a particular device?
#vxdisk list device_name
Page 55 of 56
Example
#vxdisk list c2t0d0s2
How to view multipathing information?
#vxdmpadm getsubpaths dmpnodename=enclosure_name
Example
#vxdmpadm getsubpaths dmpnodename=enc_clarrion0
How to display the DMP node that controls a particular physical path?
#vxdmpadm getdmpnode=disk_access_name
Example
#vxdmpadm getdmpnode=c0t5006016041E03B33d0s2
How to list attributes of all HBA Contollers on the system?
#vxdmpadm listctlr all
Page 56 of 56
