18 messages in org.freebsd.freebsd-scsiRecommended RAID controller| From | Sent On | Attachments |
|---|---|---|
| Walter Vaughan | Apr 27, 2004 1:28 pm | |
| Scott Long | Apr 27, 2004 3:17 pm | |
| Vinod Kashyap | Apr 27, 2004 3:35 pm | |
| David Rhodus | Apr 27, 2004 5:54 pm | |
| Pete French | Apr 28, 2004 3:19 am | |
| Vinod Kashyap | Apr 28, 2004 10:13 am | |
| Gary Stanley | Apr 28, 2004 10:47 pm | |
| Matthias Andree | Apr 29, 2004 6:13 am | |
| Paul Saab | May 3, 2004 3:50 pm | |
| Chris Dillon | May 4, 2004 4:57 pm | |
| Bob Willcox | Jun 29, 2004 11:31 am | |
| Bob Willcox | Jun 29, 2004 11:34 am | |
| randall ehren | Jun 29, 2004 11:38 am | |
| Bob Willcox | Jun 29, 2004 1:04 pm | |
| randall ehren | Jun 29, 2004 4:55 pm | |
| Bob Willcox | Jun 29, 2004 5:18 pm | |
| Kenneth D. Merry | Jun 29, 2004 5:46 pm | |
| Bob Willcox | Jun 29, 2004 5:51 pm |
| Subject: | Recommended RAID controller | |
|---|---|---|
| From: | Bob Willcox (bo...@immure.com) | |
| Date: | Jun 29, 2004 5:51:51 pm | |
| List: | org.freebsd.freebsd-scsi | |
On Tue, Jun 29, 2004 at 06:46:53PM -0600, Kenneth D. Merry wrote:
On Tue, Jun 29, 2004 at 19:18:30 -0500, Bob Willcox wrote:
On Tue, Jun 29, 2004 at 04:52:01PM -0700, randall ehren wrote:
on a side note, does anyone know if it's possible to initiate a RAID rebuild using these utilities? they seem to only allow the viewing or status, but not initiate any changes...
I thougth that the rebuild would be initiated automatically when you plug in the new drive. Is that not so?
nope. put a new drive in, can't reboot the machine until this weekend, been like this for about 36 hours now...
Bummer. Seems like that ought to be automatic.
Well, if you're writing the RAID controller firmware, you'll often want some user intervention prior to treating a newly inserted drive as a spare.
What if the user accidentally plugged the drive into the wrong SCSI (or SATA or FC or ATA) bus?
What if the user just wanted to treat the new drive as a volume, and put it on the controller so he could access it?
What if you have 2 (or more) failed arrays, how do you decide which array gets the spare?
You get the idea. You want to ask the user before potentially overwriting his data. There are probably some RAID boxes that do treat newly inserted drives as spares immediately, but you pretty much need some sort of standing policy on what to do with a "foreign" drive in that case.
Hmm, all good points. Guess I was thinking about this from the standpoint of simple convenience and overlooking the risks. :-)
Bob
Ken
-- Kenneth Merry ke...@kdm.org
-- Bob Willcox Serocki's Stricture: bo...@immure.com Marriage is always a bachelor's last option. Austin, TX