| Home | Current Systems | Former STK Products | EOL Systems | Components | General Info | Search | Feedback |
| Sun System Handbook - ISO 3.4 June 2011 Internal/Partner Edition | ||
|
|
||
 |
||||||||||||
Solution Type Problem Resolution Sure Solution 1012584.1 : Missing disk space on a Sun StorEdge[TM] NAS 5x10 Appliance
PreviouslyPublishedAs 217323 Symptoms This problem occurs when an existing volume of a given size, physically located between other existing volumes is deleted and recreated with a smaller capacity in its original location. The disk space equaling the difference between the size of the original volume and the size of the new volume in effect vanishes and can no longer be used. Resolution The problem can be seen by doing a telnet to the NAS head : Choose Menu Item D (Disks & Volumes) : On the resulting menu, enter the letter for the volume in question: audi-11 StorEdge 5210 NAS Configure Disk Disk dac1d000 Size MB 560019 MegaRAIDLD 0 RAID5 560G # START SEC SIZE SEC TYPE C OWNER USE% FREE SIZE 1 240 536870912 sfs2 /vol1 6% 236.991G/251.558G 2 536871152 10240000 sfs2 /testVol1 1% 4.793G/4.793G 3 557351152 1024000 sfs2 /test1 1% 487.476M/487.515M ... Or from the CLI with the command disk : audi-11 > disk dac1d000 # START SEC SIZE SEC TYPE C OWNER USE% FREE SIZE 1 240 536870912 sfs2 /vol1 6% 236.991G/251.558G 2 536871152 10240000 sfs2 /testVol1 1% 4.793G/4.793G 3 557351152 1024000 sfs2 /test1 1% 487.476M/487.515M ... 9 1146920959 0 free partition 10 1146920959 0 free partition 11 1146920959 0 free partition 12 1146920959 0 free partition 13 1146920959 0 free partition 14 1146920959 0 free partition 15 1146920959 0 free partition 16 1146920959 0 free partition 17 1146920959 0 free partition 18 1146920959 0 free partition 19 1146920959 0 free partition 20 1146920959 0 free partition 21 1146920959 0 free partition 22 1146920959 0 free partition 23 1146920959 0 free partition 24 1146920959 0 free partition 25 1146920959 0 free partition 26 1146920959 0 free partition 27 1146920959 0 free partition 28 1146920959 0 free partition 29 1146920959 0 free partition 30 1146920959 0 free partition 31 1146920959 0 free partition 32 39326316 30375944 free 14832MB audi-11 > In the above example, the volume /test/Vol1 originally was 2048000 sectors or 9.590G, it was then deleted and recreated at 10240000 sectors or 4.793G. Doing the math, we take the starting sector of the newly created volume On partition 2 (536871152) and add to it the size of the newly created volume (10240000) to determine the effective start of the 'NEXT' partition, we get 547111152 as the starting sector. Looking at the output above, we see the start block of the third partition is 557351152. The 'MISSING' space is the difference between the actual starting sector of the next partiton and calculated starting sector. In the above example, we lost 10240000 sectors or 5Gb Here is what is happening ... On a disk that has existing partitons (/file systems like this ..) # START SEC SIZE SEC TYPE C OWNER USE% FREE SIZE 1 240 536870912 sfs2 /vol1 6% 236.991G/251.558G 2 536871152 20480000 sfs2 /testVol1 1% 9.590G/9.591G 3 557351152 1024000 sfs2 /test1 1% 487.476M/487.515M Deleting partition 2 (in this case it is file system 2 - /testVol1) leaves a void of 20480000 (10000 MB). Now you create a file system on this free partition and this time you chose 5000 MB. The additional 5000MB is now lost (you will never recover this space). # START SEC SIZE SEC TYPE C OWNER USE% FREE SIZE 1 240 536870912 sfs2 /vol1 6% 236.991G/251.558G 2 536871152 10240000 sfs2 /testVol1 1% 4.793G/4.793G 3 557351152 1024000 sfs2 /test1 1% 487.476M/487.515M Note the partition 3 still starts at sector 557351152 as before. Relief/Workaround The only way today to recover this space is to delete either partition 2 or partition 3 and recreate the deleted partition with ALL of the available space. There is a CR (6235109) already opened requesting a change in behavior for an upcoming firmware release. For the moment, when you delete a file system on a partition in the middle of a disk, make sure you create another file system of the same size to prevent the loss of disk space. Product Sun StorageTek 5310 NAS Appliance Sun StorageTek 5210 NAS Appliance nas, audi, mustang, 5210, 5310 Previously Published As 82440 Change History Date: 2006-12-21 User Name: 7058 Action: Update Canceled Comment: *** Restored Published Content *** due to some legalities we need to remove all Mustang references on Sun's web pages by Friday. Removed mustang keyword only. Doc stays the same. Version: 0 Date: 2006-12-21 User Name: 7058 Action: Update Started Comment: due to some legalities we need to remove all Mustang references on Sun's web pages by Friday. Removed mustang keyword only. Doc stays the same. Version: 0 Date: 2005-08-23 User Name: 25440 Action: Approved Comment: Put official product name in title (was just "NAS SE5x10"). Publishing. Version: 3 Date: 2005-08-23 User Name: 25440 Action: Accept Comment: Version: 0 Date: 2005-08-23 User Name: 119902 Action: Approved Comment: Great document! I have reviewed this doc for technical accuracy, made minor gramatical changes and submit it for final review. Version: 0 Date: 2005-08-23 User Name: 119902 Action: Accept Comment: Version: 0 Date: 2005-08-23 User Name: 17023 Action: Approved Comment: Ask for a review of this document. Thanks. Version: 0 Date: 2005-08-23 User Name: 17023 Action: Created Comment: Version: 0 Product_uuid 63654ce5-f88d-11d8-ab63-080020a9ed93|Sun StorageTek 5310 NAS Appliance d4e4fc3d-7c3f-11d8-9e3a-080020a9ed93|Sun StorageTek 5210 NAS Appliance Attachments This solution has no attachment |
||||||||||||
|
||||||||||||