Seagate ST34572WC Dokumentacja Pobierz pdf (Strona 32)

# scsimgr replace_wwid –D /dev/rdisk/disk14

This command lets the storage subsystem replace the old disk’s LUN World-Wide-Identifier

(WWID) with the new disk’s LUN WWID. The storage subsystem creates a new LUN instance and

new device special files for the replacement disk.

5. Determine the new LUN instance number for the replacement disk. For example:

# ioscan –m lun

Class I Lun H/W Path Driver S/W State H/W Type Health Description

========================================================================

disk 14 64000/0xfa00/0x0 esdisk NO_HW DEVICE offline HP MSA Vol

/dev/disk/disk14 /dev/rdisk/disk14

...

disk 28 64000/0xfa00/0x1c esdisk CLAIMED DEVICE online HP MSA Vol

0/1/1/1.0x3.0x0

/dev/disk/disk28 /dev/rdisk/disk28

In this example, LUN instance 28 was created for the new disk, with LUN hardware path

64000/0xfa00/0x1c, device special files /dev/disk/disk28 and /dev/rdisk/disk28, at

the same lunpath hardware path as the old disk, 0/1/1/1.0x3.0x0. The old LUN instance 14

for the old disk now has no lunpath associated with it.

Note: If the system was rebooted to replace the failed disk, running ioscan –m lun does not

display the old disk.

6. Assign the old instance number to the replacement disk. For example:

# io_redirect_dsf -d /dev/disk/disk14 -n /dev/disk/disk28

This assigns the old LUN instance number (14) to the replacement disk. In addition, the device

special files for the new disk are renamed to be consistent with the old LUN instance number. The

following ioscan –m lun output shows the result:

# ioscan –m lun /dev/disk/disk14

Class I Lun H/W Path Driver S/W State H/W Type Health Description

========================================================================

disk 14 64000/0xfa00/0x1c esdisk CLAIMED DEVICE online HP MSA Vol

0/1/1/1.0x3.0x0

/dev/disk/disk14 /dev/rdisk/disk14

The LUN representation of the old disk with LUN hardware path 64000/0xfa00/0x0 was

removed. The LUN representation of the new disk with LUN hardware path

64000/0xfa00/0x1c was reassigned from LUN instance 28 to LUN instance 14 and its device

special files were renamed as /dev/disk/disk14 and /dev/rdisk/disk14.

7. Restore LVM configuration information to the disk. For example:

# vgcfgrestore -n /dev/vgnn /dev/rdisk/disk14

8. Restore LVM access to the disk.

If you did not reboot the system in step 2, reattach the disk as follows:

# pvchange –a y /dev/disk/disk14

If you did reboot the system, reattach the disk by reactivating the volume group as follows:

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 66 67

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Seagate ST34572WC Dokumentacja Strona 32