Re: Care and feeding of RAID?

2006-09-09 Thread Nix
On 6 Sep 2006, Mario Holbe spake: You don't necessarily need one. However, since Neil considers in-kernel RAID-autodetection a bad thing and since mdadm typically relies on mdadm.conf for RAID-assembly You can specify the UUID on the command-line too (although I don't). The advantage of the

Re: Care and feeding of RAID?

2006-09-09 Thread Nix
On 5 Sep 2006, Paul Waldo uttered the following: What about bitmaps? Nobody has mentioned them. It is my understanding that you just turn them on with mdadm /dev/mdX -b internal. Any caveats for this? Notably, how many additional writes does it incur? I have some RAID arrays using drives

Re: Please help me save my data

2006-09-09 Thread Tuomas Leikola
On 9/8/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: So, what I want to do is: * Mark the synced spare drive as working and in position 1 * Assemble the array without the unsynced spare and check if this provides consistent data * If it didnt, I want to mark the synced spare as working

2 Hard Drives RAID

2006-09-09 Thread Sandra L. McGrew
I have two hard drives installed in this DELL GX110 Optiplex computer. I believe that they are configured in RAID5, but am not certain. Is there a graphical method of determining how many drives are being used and how they are configured??? I'm using Debian, 'Sarge'... The computer is incrediby

Re: Check/repair on composite RAID

2006-09-09 Thread Tuomas Leikola
On 9/9/06, Richard Scobie [EMAIL PROTECTED] wrote: If I have a RAID 10, comprising a RAID 0, /dev/md3 made up of RAID1, /dev/md1 and RAID1, /dev/md2 and I do an: echo repair /sys/block/md3/md/sync_action will this run simultaneous repairs on the the underlying RAID 1's, or should seperate

Re: 2 Hard Drives RAID

2006-09-09 Thread Justin Piszcz
On Wed, 6 Sep 2006, Sandra L. McGrew wrote: I have two hard drives installed in this DELL GX110 Optiplex computer. I believe that they are configured in RAID5, but am not certain. Is there a graphical method of determining how many drives are being used and how they are configured??? I'm

Re: 2 Hard Drives RAID

2006-09-09 Thread berk walker
Justin Piszcz wrote: On Wed, 6 Sep 2006, Sandra L. McGrew wrote: I have two hard drives installed in this DELL GX110 Optiplex computer. I believe that they are configured in RAID5, but am not certain. Is there a graphical method of determining how many drives are being used and how they

Re: proactive-raid-disk-replacement

2006-09-09 Thread Bodo Thiesen
Michael Tokarev [EMAIL PROTECTED] wrote: mdadm -Gb internal --bitmap-chunk=1024 /dev/md4 mdadm /dev/md4 -r /dev/sdh1 mdadm /dev/md4 -f /dev/sde1 -r /dev/sde1 mdadm --build /dev/md5 -ayes --level=1 --raid-devices=2 /dev/sde1 missing mdadm /dev/md4 --re-add /dev/md5 mdadm /dev/md5 -a

Re: 2 Hard Drives RAID

2006-09-09 Thread Sandra McGrew
I'm looking into the Debian, 'Sarge' Info Center and under the device column it shows Device TypeSizeMount Point /dev/fd0autoN/A /media/floppy0 /dev/hda1 Ext335.9/ /dev/hdciso9660 N/A

RE: 2 Hard Drives RAID

2006-09-09 Thread Guy
} -Original Message- } From: [EMAIL PROTECTED] [mailto:linux-raid- } [EMAIL PROTECTED] On Behalf Of berk walker } Sent: Saturday, September 09, 2006 4:09 PM } To: Justin Piszcz } Cc: Sandra L. McGrew; linux-raid@vger.kernel.org } Subject: Re: 2 Hard Drives RAID } } Justin Piszcz wrote:

Re: UUID's

2006-09-09 Thread dean gaudet
On Sat, 9 Sep 2006, Richard Scobie wrote: To remove all doubt about what is assembled where, I though going to: DEVICE partitions MAILADDR root ARRAY /dev/md3 UUID=xyz etc. would be more secure. Is this correct thinking on my part? yup. mdadm can generate it all for you... there's

Re: Care and feeding of RAID?

2006-09-09 Thread dean gaudet
On Tue, 5 Sep 2006, Paul Waldo wrote: What about bitmaps? Nobody has mentioned them. It is my understanding that you just turn them on with mdadm /dev/mdX -b internal. Any caveats for this? bitmaps have been working great for me on a raid5 and raid1. it makes it that much more tolerable