Hp StorageWorks Scalable File Share Uživatelský manuál stáhnout pdf (Strana 286)

Troubleshooting9–62

3. Identify the component LUNs that are used to mirror the LUN, using the show lun lun_number

command as shown in the following example:

sfs> show lun 41

LUN (WWID): raid_41

Component LUN Size (GB)

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

19 1900

22 1900

In this example, LUNs 19 and 22 are components of LUN 41.

4. As displayed by the show filesystem command in Step 2, the mds8 service is running on the

south2 server. Log in to that server and determine which RAID device is associated with LUN 41, as

shown in the following example:

# ls -l /dev/hpls/dev41a

lrwxrwxrwx 1 root root 15 Nov 4 17:23 /dev/hpls/dev41a -> /dev/md0

You can confirm this by examining the raidtab file used to create the RAID device, as shown in the

following example:

# cat /var/raid/raidtab.mds8

DEVICE /dev/sdb

DEVICE /dev/sdc

ARRAY /dev/md0

level=raid1

num-devices=2

devices=/dev/sdb,/dev/sdc

# chunk=8 # For use by lsraidlib.tcl

5. Use the mdadm command and the /proc/mdstat file to examine the status of the component

device, as shown in the following example:

# mdadm --detail /dev/md0

/dev/md0:

State : clean, degraded

Number Major Minor RaidDevice State

0 8 16 0 active sync /dev/sdb

1 8 32 -1 faulty /dev/sdc

# cat /proc/mdstat

Personalities : [linear] [raid0] [raid1] [raid5] [multipath]

read_ahead 1024 sectors

md0 : active raid1 sdc[1] (F) sdb[0]

146800576 blocks [2/1] [U_]

If you have stopped and restarted the file system or rebooted the south2 server, the status may

indicate that the failed component is missing, instead of failed. In this case, the mdadm command

shows a different status, as shown in this example:

# mdadm --detail /dev/md0/dev/md0

State : clean, degraded

Number Major Minor RaidDevice State

0 8 16 0 active sync /dev/sdb

1 0 0 -1 removed

Whether the component is failed or missing does not matter; proceed with the remaining steps.

1 2 ... 281 282 283 284 285 286 287 288 289 290 291 ... 361 362

Komentáře k této Příručce

Žádné komentáře

Hp StorageWorks Scalable File Share Uživatelský manuál Strana 286

Komentáře k této Příručce

Související produkty a manuály pro Úložný prostor Hp StorageWorks Scalable File Share