Lucent Technologies 585-210-940 manual Replacing a faulty disk, Identify the faulty disk

Maintaining Mirrored Systems	CentreVu CMS Release 3 Version 8 Disk-Mirrored Systems
Replacing a faulty disk	69

Replacing a faulty disk

Step 1: Identify the faulty disk

This section explains how to replace a faulty disk. The system does not need to be powered off or rebooted to perform this procedure.

A disk problem is usually indicated in the /var/adm/messages file. The following lines, for example, indicate a disk problem:

Jun 12 16:27:08 leopard		unix: WARNING:
Jun 12	16:27:08 leopard	unix: Error for command
’read(10)’ Error Level:		R
Jun 12	16:27:09 leopard	unix: retryable
Jun 12	16:27:09 leopard	unix: Requested Block 0,
Error Block: 0

Jun 12 16:27:09 leopard unix: Sense Key: Media Error

Jun 12		16:27:09 leopard unix: Vendor ’SEAGATE’:
Jun	12	16:27:09	leopard unix: ASC = 0x31 (medium
format		corrupted), ASCQ
= 0x0,		FRU = 0x9
Jun	12	16:27:09	leopard unix: WARNING:

/sbus@3,0/SUNW,fas@3,8800000/sd@2,0

Those lines, however, do not tell us which disk has the problem. One way of finding out is to enter an ls -l /dev/dsk/c*command and search the output for a device description matching that in the warning message. For example:

#ls -l /dev/dsk/c*

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lrwxrwxrwx 1 root	root	50 Apr 24 15:21

/dev/dsk/c0t2d0s0 -> ../../devices/sbus@3,0/SUNW,fas @3,8800000/sd@2,0:a

lrwxrwxrwx 1 root root 50 Apr 24 15:21 /dev/dsk/c0t2d0s1 -> ../../devices/sbus@3,0/SUNW,fas @3,8800000/sd@2,0:b

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That the ”/iommu@0....” information matches the same information in the

warning message indicates that disk c0t2d0 is the faulty disk.