Sun StorEdge[TM] 33x0/3510/3511: What does the "M" mean in the show disks output

Asset ID:	1-71-1002402.1
Update Date:	2010-01-14
Keywords:

Solution Type Technical Instruction Sure

Solution 1002402.1 : Sun StorEdge[TM] 33x0/3510/3511: What does the "M" mean in the show disks output

Related Items


Sun Storage 3510 FC Array
 Sun Storage 3310 Array
 Sun Storage 3511 SATA Array

Related Categories


GCS>Sun Microsystems>Storage - Disk>Modular Disk - 3xxx Arrays

PreviouslyPublishedAs
203363

Description
4.x firmware for Sun StorEdge[TM] 33x0/3510/3511 has some enhancements over the earlier 3.x firmware and media scan was one of them. There are queries asked on what the "M" means on the show disk output run using the sccli. This document helps in resolving the same.

Steps to Follow
With the array running 4.x firmware and with the host using SUNWsscs version 2.x, the show disk output looks as follows:

$ sccli> show disks
Ch     Id      Size   Speed  LD     Status     IDs                      Rev
----------------------------------------------------------------------------
2(3)   0  136.73GB   200MB  ld0    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C020H3
WWNN 500000E01118DD70
2(3)   1  136.73GB   200MB  ld0    ONLINE     FUJITSU MAT3147F SUN146G 0602
S/N 000520C020R1
WWNN 500000E01118FF50
2(3)   2  136.73GB   200MB  ld0    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C020H4
WWNN 500000E01118DD80
2(3)   3  136.73GB   200MB  ld0    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C02269
WWNN 500000E01119A310
2(3)   4  136.73GB   200MB  ld0    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C02273
WWNN 500000E01119AAE0
2(3)   5  136.73GB   200MB  ld0    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C020H5
WWNN 500000E01118DD90
2(3)   6  136.73GB   200MB  ld0    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C02264
WWNN 500000E01119A260
2(3)   7  136.73GB   200MB  ld1    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C02200
WWNN 500000E011199410
2(3)   8  136.73GB   200MB  ld1    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C01Y68
WWNN 500000E011186AA0
2(3)   9  136.73GB   200MB  ld1    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C020H2
WWNN 500000E01118DD60
2(3)  10  136.73GB   200MB  ld1    ONLINE   M FUJITSU MAT3147F SUN146G 0602
S/N 000520C020S9
WWNN 500000E011190240
2(3)  11  136.73GB   200MB  GLOBAL STAND-BY   FUJITSU MAT3147F SUN146G 0602
S/N 000520C01Y65
WWNN 500000E0111869B0
The following are true on the above.
1. The "M" means that media scan was running on the drive when the show disk
was run.
2. The disk with ID = 1 does not have a "M" against which means that the media
scan has completed on that disk. The media scan on each disk will complete
at different times. If we run the command, "show disks" at a later time, the
disk with id=1 may have a "M" against it, indicating that a media scan is in
progress.
3. By default, with the latest 4.2x firmware, media scans at power-up are
disabled. When explicitly enabled, media scans are run continuously on all
active drives in all logical drives. Whenever a logical drive is created,
continuous media  scans begin on all its component physical drives.
You can select a logical drive and change media scan settings for all
physical drives in that logical drive. Global spares and unassigned drives
are not part of any logical drive and so media scan does not run on these.
In addition to the above, there is one more command called "show media-check"
added in 2.x sccli and and using this, we can find the completion status of the
media-scan.
sccli> show media-check
Ch  ID  Iteration  Status
------------------------------
2  16  1169       96% complete
2  17  1169       97% complete
2  18  1164       33% complete
2  19  1215       96% complete
2  20  1169       99% complete
2  21  1170       1% complete
2  23  1169       97% complete
2  24  1215       60% complete
2  25  1169       97% complete

Product
Sun StorageTek 3511 SATA Array
Sun StorageTek 3510 FC Array
Sun StorageTek 3310 SCSI Array
Sun StorageTek 3320 SCSI Array

Internal Comments
There was a Bug ID 6255677 where upon a drive failure, the media scan wasn't started automatically on the replacement drive. This has been fixed by the latest 4.13 release of the firmware which is now available on SunSolve[SM] for all the 3 products ie SE3510/3310/3511.

media-scan, 3310, 3510, 3511, media-check, check-media
Previously Published As
82482

Change History
Date: 2010-01-12
User Name: sue.copeland@sun.com
Action: Currency & Update
Date: 2006-03-20
User Name: 95826
Action: Approved
Comment: - verified metadata
- changed review date to 2007-03-20
- checked for TM - none added
- checked audience : contract
Publishing
Version: 6
Date: 2006-03-20
User Name: 95826
Action: Accept
Comment:
Version: 0

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