Re: atacontrol raid1 vs. gmirror
Jon Simola wrote: On 6/11/05, Paul Mather [EMAIL PROTECTED] wrote: I found array rebuilding to be troublesome on atacontrol RAID Some bits from the in-house documentation I've been writing. I've tested this on multiple occasions on my 1U Supermicro SATA boxes, so might possibly be interesting for someone. Ooof. I have my Supermicro SATA 1Us running gmirror. A bit easier than your procedures: http://dannyman.toldme.com/2005/01/24/freebsd-howto-gmirror-system/ Cheers, -danny -- http://dannyman.toldme.com/ ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: atacontrol raid1 vs. gmirror
On 6/11/05, Paul Mather [EMAIL PROTECTED] wrote: I found array rebuilding to be troublesome on atacontrol RAID Some bits from the in-house documentation I've been writing. I've tested this on multiple occasions on my 1U Supermicro SATA boxes, so might possibly be interesting for someone. * RAID setup: (If required, FreeBSD only) - ensure that the drives are probed as ad4 and ad6 like: ad4: 76324MB [155072/16/63] at ata2-master SATA150 ad6: 76324MB [155072/16/63] at ata3-master SATA150 - if they do not probe correctly, check the BIOS settings above - perform a minimal install of FreeBSD 5.3 (do not worry about network or anything) - reboot from the installed OS and login as root - Run the command atacontrol create RAID1 ad4 ad6 to create the raid set - Reboot and reinstall the OS, choosing ar0 as the drive, which should probe like: ad4: 76324MB [155072/16/63] at ata2-master SATA150 ad6: 76324MB [155072/16/63] at ata3-master SATA150 ar0: 76324MB [9730/255/63] status: READY subdisks: disk0 READY on ad4 at ata2-master disk1 READY on ad6 at ata3-master Minimal Survival for FreeBSD software RAID1 sets * Read the atacontrol man page * atacontrol status ar0 - to check the status * atacontrol detach 2 - to detach ad4 if failed (again, use 3 for ad6). The SATA disks in the 5013C-T chassis are hotswappable, so it can be pulled once detached. * atacontrol attach 2 - to reattach ad4 once replaced * atacontrol addspare ar0 ad4 - to add the replaced ad4 as a spare on the RAID set * atacontrol rebuild ar0 - to rebuild the mirror -- Jon Simola Systems Administrator ABC Communications ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: atacontrol raid1 vs. gmirror
On Mon, Jun 13, 2005 at 11:14:03AM -0700, Jon Simola wrote: - if they do not probe correctly, check the BIOS settings above - perform a minimal install of FreeBSD 5.3 (do not worry about network or anything) - reboot from the installed OS and login as root - Run the command atacontrol create RAID1 ad4 ad6 to create the raid set Since the 5.4 CD is now also a live-CD, you could probably do this from the fixit console rather than having to do an install... Craig ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
atacontrol raid1 vs. gmirror
Can someone explain tome the difference between a RAID1 setup done via atacontrol and gmirror? I have a VIA 6420 SATA150 controller, which also has raid, but is not supported by -stable. ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: atacontrol raid1 vs. gmirror
On Sat, 2005-06-11 at 14:42 -0400, Mike Jakubik wrote: Can someone explain tome the difference between a RAID1 setup done via atacontrol and gmirror? I have a VIA 6420 SATA150 controller, which also has raid, but is not supported by -stable. Here are the main differences, as I see them: atacontrol RAID: - Only for ATA; - Compatible with quite a few ATA RAID card BIOS metadata formats, hence you can create the RAID using the RAID controller's BIOS menu; - Supports only two-way mirroring (IIRC); - Supports spares. gmirror: - Works with any GEOM provider (ATA, SCSI, ggate, etc.); - Uses the last sector of each RAID component to store its own metadata; - Supports N-way mirroring; - Does not support spares (though gmirror activate/deactivate can be used to associate a component with a mirror somewhat akin to having a spare). I found array rebuilding to be troublesome on atacontrol RAID---so much so I abandoned it and used vinum and then gmirror instead for my RAID 1. (I have a bootable geom_mirror setup, now.) Mind you, that was in the pre-ATA mk.III days, and I hear the RAID support underwent a big revamp in the mk.III rewrite. Cheers, Paul. -- e-mail: [EMAIL PROTECTED] Without music to decorate it, time is just a bunch of boring production deadlines or dates by which bills must be paid. --- Frank Vincent Zappa ___ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to [EMAIL PROTECTED]
