Date: Tue, 6 Mar 2007 08:49:47 +0100 From: "Michel, Dietmar" <Dietmar_Michel@bmc.com> To: "Derek Ragona" <derek@computinginnovations.com>, <freebsd-questions@freebsd.org> Subject: RE: RAID5 degraded - system hangs Message-ID: <0C398216960631429151B4A4B6B1FC03038CCAB4@fra-ex-01.adprod.bmc.com> References: <0C398216960631429151B4A4B6B1FC03038CCAB0@fra-ex-01.adprod.bmc.com> <6.0.0.22.2.20070305164542.025808f8@mail.computinginnovations.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi Derek,
=20
at least your comment to SATA hot swap is right.
But disk failure are during work anyway. So at least after rebooting and =
replacing the disk (I reconnected the disk offline and powered on again) =
I had to had a chance to rebuild the array.
But as described I get no prompt in any boot option.
=20
Dietmar
________________________________
From: Derek Ragona [mailto:derek@computinginnovations.com]
Sent: Mon 3/5/2007 11:50 PM
To: Michel, Dietmar; freebsd-questions@freebsd.org
Subject: Re: RAID5 degraded - system hangs
I'm no expert, but have experienced a few RAID issues. First, RAID 5 =
will become degraded and will try to rebuild upon a drive failure, once =
the failed drive is replaces. In Mirrored RAID, RAID 1, or RAID 10, the =
system will continue to function on the good drive but will alert the =
administrator of the drive failure.
One last thing, SATA RAID drives, while they are often said to be =
hot-swapable, most manufacturer's recommend power-off then swap drives. =
With SCSI hot swapable drives they can be swapped with power still on.
-Derek
At 09:22 AM 3/5/2007, Michel, Dietmar wrote:
Hi Guys,
=09
=20
=09
I=B4m using an older Server with FreeBSD 6.2 als Fileserver in my home =
office.
=09
Now I made an upgrade using 4 SATA II disks connected to a promise =
TX4310 Raid controller.
=09
Defining a RAID5 a bios level, starting the server and building up the =
Raid at OS level:
=09
# atacontrol create RAID5 32 ad4 ad6 ad8 ad10
=09
# bsdlable ...
=09
# newfs ...
=09
=20
=09
And now I have a functional Raid named ar0.
=09
=20
=09
At boot time the bios told me that even at this level the raid in =
initializing - world seemed to be ok.
=09
=20
=09
Now I tried to prove Raid function and disconnect one disk.
=09
Theoretical data is covered by the rest of 3 ... but after I get the =
system message that one disk has been disconnected the maschine stopps =
working.
=09
Told me: ar0 raid 5 degarded after a fw minutes no input is possibble.=20
=09
=20
=09
=20
=09
Even after reboot=20
=09
....
=09
ar0: disk0 Ready
ar0: disk1 Ready
ar0: disk2 Ready
ar0: disk3 down no device found
=09
... end of work
=09
=20
=09
No single user mode or other starting option seemed to work.
=09
I have no chance to rebuild the raid via atacontrol.
=09
=20
=09
Any hints?
=09
Raid without reliability doesn=B4t make sense!
=09
=09
=09
Regards
=09
=20
=09
Dietmar=20
=09
_______________________________________________
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to =
"freebsd-questions-unsubscribe@freebsd.org"
=09
--=20
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
MailScanner thanks transtec Computers for their support.
--=20
This message has been scanned for viruses and=20
dangerous content by MailScanner <http://www.mailscanner.info/>; , and is =
believed to be clean.=20
MailScanner thanks transtec Computers <http://www.transtec.co.uk/>; for =
their support.=20
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?0C398216960631429151B4A4B6B1FC03038CCAB4>