Disk ownership assignment on an FAS270/FAS270c appliance

About FAS270/FAS270c disk ownership

The Network Appliance FAS270 and FAS270c appliances consist of a single disk shelf of 14 disks and either one internal filer head (on the FAS270) or two clustered internal filer heads (on the FAS270c). By design, a disk located on this common disk shelf can, if the appliance has two filer heads, be assigned to the ownership of either one of the two filer heads. The ownership of each disk is ascertained by an ownership record written on each disk.

Network Appliance delivers the FAS270 and FAS270c appliances with each disk preassigned to the one FAS270 internal filer head or preassigned to either one of the two FAS270c filer heads.

However, if you add one or more disk shelves to an existing FAS270 or FAS270c appliance, you might have to assign ownership to the disks contained on those shelves.

You can use the disk show command and the disk assign command to display, assign, and modify disk ownership on the FAS270 and the FAS270c.

Note
The disk show command and the disk assign command are valid only on the FAS270 and FAS270c appliances.

Viewing the disk ownership

Use the disk show command plus options to view the ownership of disks on the FAS270 or the FAS270c.

Step	Action
1	From the console of one of the FAS270 or FAS270c filer heads, enter the following command to display a listing of all disks on the FAS270 or the FAS270c and their owners. fh1>`disk show -v`

Sample output

The following sample output of the disk show -v command on an FAS270c shows disks 0b.16 through 0b.29 assigned in odd/even fashion to the internal cluster nodes fh1and fh2. The 14 disks on the add-on disk shelf are still unassigned to either filer head.

fh1>disk show -v

 DISK      OWNER            POOL   SERIAL NUMBER

 --------- ---------------  -----  -------------

 0b.43     Not Owned        NONE   41229013

 0b.42     Not Owned        NONE   41229012

 0b.41     Not Owned        NONE   41229011

 0b.40     Not Owned        NONE   41229010

 0b.39     Not Owned        NONE   41229009

 0b.38     Not Owned        NONE   41229008

 0b.37     Not Owned        NONE   41229007

 0b.36     Not Owned        NONE   41229006

 0b.35     Not Owned        NONE   41229005

 0b.34     Not Owned        NONE   41229004

 0b.33     Not Owned        NONE   41229003

 0b.32     Not Owned        NONE   41229002

 0b.31     Not Owned        NONE   41229001

 0b.30     Not Owned        NONE   41229000

 0b.29     fh1 (84165672)   Pool0  41226818

 0b.28     fh2 (84165664)   Pool0  41221622

 0b.27     fh1 (84165672)   Pool0  41226333

 0b.26     fh2 (84165664)   Pool0  41225544

 0b.25     fh1 (84165672)   Pool0  41221700

 0b.24     fh2 (84165664)   Pool0  41224003

 0b.23     fh1 (84165672)   Pool0  41227932

 0b.22     fh2 (84165664)   Pool0  41224591

 0b.21     fh1 (84165672)   Pool0  41226623

 0b.20     fh2 (84165664)   Pool0  41221819

 0b.19     fh1 (84165672)   Pool0  41227336

 0b.18     fh2 (84165664)   Pool0  41225345

 0b.17     fh1 (84165672)   Pool0  41225446

 0b.16     fh2 (84165664)   Pool0  41201783

Additional disk show options

The additional disk show options are listed below.

disk show parameter	Information displayed
`disk show -a`	Shows all disks that have an owner
`disk show [-o` hostname `\| -s`nvram_id]	Shows all disks owned by a specified host or its NVRAM ID (the NVRAM number shipped with the filer head)
`disk show -n`	Shows all the disks that do not have an owner
`disk show -v`	Shows all the visible disks

Assigning disks on the FAS270 or the FAS270c

To assign disks that are currently labeled "not owned," complete the following steps.

Step	Action
1	In the CLI of the FAS270 or FAS270c filer head to which you want to assign disks, use the `disk show -n` command to view all disks that do not have assigned owners.
2	Use the following command to assign the disks that are labeled "not owned" to one of the filer heads. *disk assign {disk1* [disk2] [...]\|all}** disk1 [disk2] [...] are the names of the disks to which you want to assign ownership. `all` is the option to assign all of the unowned disks to the current filer head. Example The following command assigns six disks on the FAS270c to the filer fh1: fh1> `disk assign 0b.43 0b.41 0b.39 0b.37 0b.35 0b.33` Result The specified disks are assigned as disks to the specified filer.
3	Use the `disk show -v` command to verify the disk assignments that you have just made.

Step

Action

In the CLI of the FAS270 or FAS270c filer head to which you want to assign disks, use the disk show -n command to view all disks that do not have assigned owners.

Use the following command to assign the disks that are labeled "not owned" to one of the filer heads.

disk assign {disk1 [disk2] [...]|all}

disk1 [disk2] [...] are the names of the disks to which you want to assign ownership.

all is the option to assign all of the unowned disks to the current filer head.

Example

The following command assigns six disks on the FAS270c to the filer fh1:

fh1> disk assign 0b.43 0b.41 0b.39 0b.37 0b.35 0b.33

Result

The specified disks are assigned as disks to the specified filer.

Use the disk show -v command to verify the disk assignments that you have just made.

After you have assigned disks to the one internal FAS270 filer head or to one of the two internal FAS270c filer heads, you can assign those disks to volumes on the filer that owns them or leave them as spare disks on the filer that owns them.

Modifying disk assignments on the FAS270c appliance

You can also use the disk assign command to modify the ownership of any disk assignment that you have made. This includes, on the FAS270c, reassigning a disk from one filer head to the other or, on either the FAS270 or FAS270c appliance, changing an assigned disk back to "not owned" status.

Caution
Network Appliance recommends that disk assignments be modified only for spare disks. Disks that have already been assigned to a volume cannot be reassigned without endangering all the data and the structure of that entire volume.

To modify disk ownership assignments on the FAS270 or the FAS270c, complete the following steps.

Step	Action
1	In the CLI of the FAS270 or FAS270c filer head whose disks you want to reassign, use the `vol status -r` command to view the spare disks, whose ownership can safely be changed.
2	Use the following command to modify assignment of the spare disks. disk assign disk1 [disk2] [...] -f {-o ownername \| -s unowned \| -s sysid} disk1 [disk2] [...] are the names of the spare disks whose ownership assignment you want to modify. -f is a switch required for changing the assignment of disks that have already been assigned ownership. -o ownername specifies the host name of the internal filer head to which you want to reassign the disks in question. -s unowned modifies the ownership assignment of the disks in question back to "not owned." -s sysid is the factory-assigned NVRAM number of the internal filer head to which you want to reassign the disks in question. Example The following command unassigns four disks on the FAS270c from the filer fh1: fh1>`disk assign 0b.30 0b.29 0b.28 0b.27 -s unowned`
3	Use the `disk show -v` command to verify the disk assignment modifications that you have just made.

Step

Action

In the CLI of the FAS270 or FAS270c filer head whose disks you want to reassign, use the vol status -r command to view the spare disks, whose ownership can safely be changed.

Use the following command to modify assignment of the spare disks.

disk assign disk1 [disk2] [...] -f {-o ownername | 

-s unowned | -s sysid}

disk1 [disk2] [...] are the names of the spare disks whose ownership assignment you want to modify.

-f is a switch required for changing the assignment of disks that have already been assigned ownership.

-o ownername specifies the host name of the internal filer head to which you want to reassign the disks in question.

-s unowned modifies the ownership assignment of the disks in question back to "not owned."

-s sysid is the factory-assigned NVRAM number of the internal filer head to which you want to reassign the disks in question.

Example

The following command unassigns four disks on the FAS270c from the filer fh1:

fh1>disk assign 0b.30 0b.29 0b.28 0b.27 -s unowned

Use the disk show -v command to verify the disk assignment modifications that you have just made.