lkml.org 
[lkml]   [2006]   [Jan]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRE: [PATCH 000 of 5] md: Introduction
Date
From
> 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,

lincoln.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-01-17 22:40    [W:0.515 / U:0.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site