Messages in this thread | | | Subject | RE: [PATCH 000 of 5] md: Introduction | Date | Wed, 18 Jan 2006 05:38:12 +0800 | From | "Lincoln Dale \(ltd\)" <> |
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> Neil, is this online resizing/reshaping really needed? I understand > all those words means alot for marketing persons - zero downtime, > online resizing etc, but it is much safer and easier to do that stuff > 'offline', on an inactive array, like raidreconf does - safer, easier, > faster, and one have more possibilities for more complex changes. It > isn't like you want to add/remove drives to/from your arrays every day... > Alot of good hw raid cards are unable to perform such reshaping too.
RAID resize/restripe may not be so common with cheap / PC-based RAID systems, but it is common with midrange and enterprise storage subsystems from vendors such as EMC, HDS, IBM & HP. in fact, I'd say it's the exception to the rule _if_ an midrange/enterprise storage subsystem doesn't have an _online_ resize capability..
personally, I think this this useful functionality, but my personal preference is that this would be in DM/LVM2 rather than MD. but given Neil is the MD author/maintainer, I can see why he'd prefer to do it in MD. :)
cheers,
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