Asset ID:	1-71-1008194.1
Update Date:	2009-09-23
Keywords:

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Solution Type  Technical Instruction Sure

Solution  1008194.1 :   How to find the number of segements (Extents) attached to a Volume on NAS  


PreviouslyPublishedAs
211253

Description

While looking at the Diagnostic report of NAS (Sun StorageTek[TM] 5xx0 NAS Appliances) we only get the Volume name and the LUN information on which the Volume was created. There is no information in the Diagnostic mail which would provide the information on how many Segment (also called Extents) are attached to the Volume as shown below.

 - Volume : /vol1        (isp2d020,1)
Total Capacity : 20113 MB

This document would talk about the procedure which can be used to find the different Segments (Extents) attached to the a particular Volume.

Steps to Follow

Login into the NAS by telnet (or other services) to access the command line.

The first option is look at the bootlogs/syslogs to see how many Segments (Extents) were attached to the volume while booting.

1. Look at the bootlog (or syslog) for the following output

  04/16/07 19:18:09 I sfs2: /vol1 - id=65D22A33, extent 1 of 3, version 2
04/16/07 19:18:09 I sfs2: /vol1 - id=65D22A33, extent 2 of 3, version 2
04/16/07 19:18:09 I sfs2: /vol1 - id=65D22A33, extent 3 of 3, version 2

The above output provide the details on number of extent attached to the volume while bringing the volume online. In normal scenario we should be able to see the extent # of # being attached to the volume.

2. The next step is to know which different LUNs have these Segments from

  a. From the command line run "disk" to see the LUN available on the NAS.

  SE5310 > disk
ide1d1     250367KB
isp2d020   1950909439KB
isp2d021   1950909439KB

  b. Now select the disk name (ispXd

  SE5310 > disk isp2d020
# START SEC SIZE SEC  TYPE    OWNER      USE% FREE KB  SIZE KB  REQUESTS ACTI
- --------- --------- ------- ---------- ---- -------- -------- -------- ----
0         0 -393148417         SUN     CSM100_R_FC
1       240  20971520 sfs2    (vol1)
2  20971760  10485760 sfs2ext ~seg1             4.909G
3  31457520 -424605937         free 1889824MB

  SE5310 > disk isp2d021
# START SEC SIZE SEC  TYPE    OWNER      USE% FREE KB  SIZE KB  REQUESTS ACTI
- --------- --------- ------- ---------- ---- -------- -------- -------- ----
0         0 -393148417         SUN     CSM100_R_FC
1       240  10485760 sfs2    (vol1)
2  10486000  10485760 sfs2    (vol1)
3  20971760 -414120177         free 1894944MB

The above output provide the details on the partitions (Volume/Segements) created on the LUN Entry "1" shows that a partition exists which is part of vol1. Here vol1 is in "()" because vol1 is currently unmounted. Entry "2" indicate a partition which is unattached segment

Product
Sun StorageTek 5220 NAS Appliance
Sun StorageTek 5310 NAS Gateway/Cluster System
Sun StorageTek 5310 NAS Gateway System
Sun StorageTek 5310 NAS Appliance

NAS, 5310, 5320, 5210, 5220, 5320C, 5310C, partitions, Segments, Extents, Volume
Previously Published As
89072

Change History
Date: 2007-05-16
User Name: 97961
Action: Approved
Comment: - Applied trademarking where it is missing
- Tidied up formatting
Version: 4
Date: 2007-05-16
User Name: 97961
Action: Accept
Comment:
Version: 0
Date: 2007-05-16
User Name: 147406
Action: Approved
Comment: Hi,
I have reviewed it for technical content. Please do the final review.
Thanks,
sushil
Version: 0
Date: 2007-05-10
User Name: 156181
Action: Approved
Comment: Hi Sushil

"id=65D22A33" are logged in the logs, while with dump command it wont be possible to map the extent. The logs always display the id of the first segment of the volume. Hence I have not used the same command in this document.

Please let me know your comments on this.

Kind Regards
Krishan Parmar
x89007
Version: 0
Date: 2007-05-04
User Name: 147406
Action: Rejected
Comment: Hi Krishan,
Can you include the command that Kuswandi mentioned:
There is a command to display the extents, use disk command with dump option.
The extent id numbers appear in the log.

-Kus

Sample below:
SE5310-NASb > disk
ide1d1 250367KB
isp2d020 285689773KB
isp2d021 285689773KB
SE5310-NASb > disk isp2d020
# START SEC SIZE SEC TYPE OWNER USE% FREE KB SIZE KB REQUESTS ACTI
- --------- --------- ------- ---------- ---- -------- -------- -------- ----
0 0 571379547 SUN CSM100_R_FC
1 240 157286400 sfs2 /stuff 2% 101.119G/103.167G 503769+0
2 157286640 41943040 sfs2 /stuff 2% 101.119G/103.167G 503769+0
3 199229680 20971520 sfs2 /stuff 2% 101.119G/103.167G 503769+0
4 220201200 204800 sfs2 /Win 1% 94.351M/94.398M 12769+0

SE5310-NASb > disk isp2d020,1 dump
SFS2 Volume /stuff: VolumeID 5A10AA19 ExtensionID 5A10AA1B
Total pages=19660800, n_inode=19317888, n_data=19318999, n_check=18887
Extent count=3
Ext0: ID 5A10AA1B
Ext1: ID 5A10AA23
Ext2: ID 5A10AA27
Journal ID 0
Flags 0x000090E0
Version: 0
Date: 2007-04-17
User Name: 147406
Action: Accept
Comment:
Version: 0
Date: 2007-04-16
User Name: 156181
Action: Approved
Comment: Dear Sir

Please review and provide your inputs.

Kind Regards
Krishan Parmar
x50079
Version: 0
Date: 2007-04-16
User Name: 156181
Action: Created
Comment:
Version: 0
Product_uuid
a656fa3d-fc97-11da-ac3d-080020a9ed93|Sun StorageTek 5220 NAS Appliance
fb861199-9cd7-11da-85b4-080020a9ed93|Sun StorageTek 5310 NAS Gateway/Cluster System
8a8b6eeb-092e-11da-99bc-080020a9ed93|Sun StorageTek 5310 NAS Gateway System
63654ce5-f88d-11d8-ab63-080020a9ed93|Sun StorageTek 5310 NAS Appliance

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