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Extend/shrink deduplicated disk

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Extend/shrink deduplicated disk

Postby andyman80 » Thu Aug 25, 2011 7:00 am

Is there any way to extend (increase the reported to OS disk size) or shrink (decrease the size of the underlying .spdata files) of the deduplicated thin-provisioned disk in SW 5.7.1733?
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Re: Extend/shrink deduplicated disk

Postby anton (staff) » Thu Aug 25, 2011 5:06 pm

You cannot do it right now. You would be able to expand the disk adding new LUN to it (pretty much like hardware RAID controllers do) but we're not going to provide any functionality for decreasing virtual disk size (leaves too many questions for underlying file system layout).

andyman80 wrote:Is there any way to extend (increase the reported to OS disk size) or shrink (decrease the size of the underlying .spdata files) of the deduplicated thin-provisioned disk in SW 5.7.1733?
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Re: Extend/shrink deduplicated disk

Postby andyman80 » Fri Aug 26, 2011 4:32 am

Do you have plans to implement disk extend functionality in future versions?
As for shrink, I guess It could be done by creating a brand new thin-provisioned disk followed by copying the contents of the old disk to the new one. Anyway it will require some extra disk space for that.
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Re: Extend/shrink deduplicated disk

Postby anton (staff) » Fri Aug 26, 2011 10:37 am

Yes of course. Already mentioned multi-LUN extending feature should be released as part of V5.8 de-duplication engine.

Sure you can proceed this way. Extra copy of data but you can call it "backup" in any case :)

andyman80 wrote:Do you have plans to implement disk extend functionality in future versions?
As for shrink, I guess It could be done by creating a brand new thin-provisioned disk followed by copying the contents of the old disk to the new one. Anyway it will require some extra disk space for that.
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Re: Extend/shrink deduplicated disk

Postby andyman80 » Fri Aug 26, 2011 10:58 am

Well, I mean the old disk should be deleted afterwards. :) Thanks for you help.
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Re: Extend/shrink deduplicated disk

Postby anton (staff) » Sat Aug 27, 2011 8:59 pm

Yes, that's a plan: copy content to brand new disk, check it (new disk) for integrity and delete old disk afterwards. To do the same automatically we need to parse file system content and there are too many file systems could be layered on top of iSCSI block device.
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Re: Extend/shrink deduplicated disk

Postby clickmaster » Thu Nov 12, 2015 6:00 pm

Is this a feature now? I get an error when I try to extend a LSFS thin-provisioned HA device with deduplication.
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Re: Extend/shrink deduplicated disk

Postby Bohdan (staff) » Mon Nov 23, 2015 11:28 am

We have this feature in plans, but it is not ready yet.
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Re: Extend/shrink deduplicated disk

Postby chilling » Sat Jan 09, 2016 1:43 am

Is it possible to Shrink a disk in StarWind 8.0.8198?
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Re: Extend/shrink deduplicated disk

Postby Tarass (Staff) » Mon Jan 11, 2016 11:10 am

Please find the answer here: viewtopic.php?f=5&t=4433#p25109
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