Re: State of gvinum RELENG_5 or RELENG_5_4 ?!
On Thursday, 12 May 2005 at 17:16:59 +0200, Matthias Buelow wrote: > Peter Orlowski wrote: > >>> At this point, I'm thinking that as far as S/W RAID goes in FreeBSD, the >>> "R" is pretty meaningless >> >> Well, "R" does not mean "redundant" but "realtime backup" ;-(. > > BTW., what is the status of RaidFrame on FreeBSD? I remember some time > ago people were working on integrating it into 5.x or so? I have good > experience with Raidframe on NetBSD, and less good with vinum on FreeBSD > so I'd be delighted if Raidframe could make it into FreeBSD (and work > equally well, of course). RAIDFrame was introduced to FreeBSD some years ago, but died during to lack of love. Greg -- See complete headers for address and phone numbers ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: State of gvinum RELENG_5 or RELENG_5_4 ?!
Peter Orlowski wrote: >>At this point, I'm thinking that as far as S/W RAID goes in FreeBSD, the >>"R" is pretty meaningless > > Well, "R" does not mean "redundant" but "realtime backup" ;-(. BTW., what is the status of RaidFrame on FreeBSD? I remember some time ago people were working on integrating it into 5.x or so? I have good experience with Raidframe on NetBSD, and less good with vinum on FreeBSD so I'd be delighted if Raidframe could make it into FreeBSD (and work equally well, of course). mkb. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: State of gvinum RELENG_5 or RELENG_5_4 ?!
On Wed, May 11, 2005 at 11:42:02AM -0600, secmgr wrote: > > > >I had to erase the gmirror metadata on the intact disk to get it > >to work again. > > > What steps did you take to the gmirror the disk so you could get your > data back? I took the physically intact disk and did a gmirror clear /dev/ad4 . Then I could fsck the filesystems on it and use it as plain /dev/ad4, i.e. no longer as a mirrored disk. Probably I could have started over with gmirror label m1 ad4 but I was reluctant to do that to a disk that had all the user data on it. So I rather changed the fstab not to use the mirror any more. At some stage in that procedure I also lost the gmirror metadata on the gmirrored system disk. It's not clear to me how that happened, but when I tried to boot the system after removing the physically broken SATA-disk, that is with only the "logically broken" part of the data gmirror installed (before erasing the gmirror metadata), it found only the broken data gmirror (and did not want to use it), but the intact gmirrored system disk had completely disappeared. That didn't change when I tried to boot with the system disks alone. I had to boot a rescue system and tell fstab to use a plain disk as the system disk, too. > > At this point, I'm thinking that as far as S/W RAID goes in FreeBSD, the > "R" is pretty meaningless Well, "R" does not mean "redundant" but "realtime backup" ;-(. Peter ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: State of gvinum RELENG_5 or RELENG_5_4 ?!
Peter Orlowski wrote: On Tue, May 10, 2005 at 11:24:12AM -0600, secmgr wrote: Gabor Esperon wrote: How reliable is the gmirror subsystem? gmirror seems fine as best as I can tell. I've been running it for a few months on sata drives. I had gmirror running on two IDE drives for system and two SATA drives for user data. That was RELENG_5_3. When one of the SATA drives broke (later I got errors like ad4: FAILURE - READ_DMA status=51 on fscking) the whole system just stopped. I could switch consoles but nothing else. Nothing in the logs either. I believe it had lost all it's file systems. After power cycling, both mirrors were found but marked as broken. Gmirror chose the defective SATA disk as the intact one and started rebuilding the mirror from that - but fscking the mirror failed, obviously, so I ended up with one disk that was broken, but marked intact by gmirror and one disk the other way round. I had to erase the gmirror metadata on the intact disk to get it to work again. I'd say gmirror will save your data but it won't save you from some downtime... Greetings, Peter What steps did you take to the gmirror the disk so you could get your data back? At this point, I'm thinking that as far as S/W RAID goes in FreeBSD, the "R" is pretty meaningless jim ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: State of gvinum RELENG_5 or RELENG_5_4 ?!
On Tue, May 10, 2005 at 11:24:12AM -0600, secmgr wrote: > Gabor Esperon wrote: > > > >How reliable is the gmirror subsystem? > > gmirror seems fine as best as I can tell. I've been running it for a > few months on sata drives. I had gmirror running on two IDE drives for system and two SATA drives for user data. That was RELENG_5_3. When one of the SATA drives broke (later I got errors like ad4: FAILURE - READ_DMA status=51 on fscking) the whole system just stopped. I could switch consoles but nothing else. Nothing in the logs either. I believe it had lost all it's file systems. After power cycling, both mirrors were found but marked as broken. Gmirror chose the defective SATA disk as the intact one and started rebuilding the mirror from that - but fscking the mirror failed, obviously, so I ended up with one disk that was broken, but marked intact by gmirror and one disk the other way round. I had to erase the gmirror metadata on the intact disk to get it to work again. I'd say gmirror will save your data but it won't save you from some downtime... Greetings, Peter -- Peter Orlowski Institut für Theoretische Physik Technische Universität Berlin ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: State of gvinum RELENG_5 or RELENG_5_4 ?!
Gabor Esperon wrote: How reliable is the gmirror subsystem? gmirror seems fine as best as I can tell. I've been running it for a few months on sata drives. jim ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
Re: State of gvinum RELENG_5 or RELENG_5_4 ?!
Edwin Brown wrote: All: I've been asked to setup a RAID-5 server using software raid. I've not worked with gvinum or vinum for that matter. I know from following the mailing lists there have been some concerns over gvinum in the 5.3-RELEASE. How are things working today? The plan would be use a 40GB ATA/100 Drive for the system and 4 SATA drives for the RAID-5 array. Will gvinum be happy with this kind of arrangement? Well, you want to stay away from vinum in 5.x. Under 5.3 gvinum and raid 5 was not robust, and I could kill a system and corrupt the array by pulling a drive. I haven't tried lately, but i'd definitly want to do some serious testing before putting that into production. If you really need raid 5, I'd look into a H/W based solution. and yes, I filed PR's that so far have not been answered. jim ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
State of gvinum RELENG_5 or RELENG_5_4 ?!
All: I've been asked to setup a RAID-5 server using software raid. I've not worked with gvinum or vinum for that matter. I know from following the mailing lists there have been some concerns over gvinum in the 5.3-RELEASE. How are things working today? The plan would be use a 40GB ATA/100 Drive for the system and 4 SATA drives for the RAID-5 array. Will gvinum be happy with this kind of arrangement? Thanks in advance Ed ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
