Re: Replace drive in RAID5 without losing redundancy?

Am 07.03.2007 um 16:14 schrieb Bill Davidsen: Neil Brown wrote: On Monday March 5, [EMAIL PROTECTED] wrote: Is it possible to mark a disk as to be replaced by an existing spare, then migrate to the spare disk and kick the old disk _after_ migration has been done? Or not even kick - but

[PATCH] fix read past end of array in md/linear.c

When iterating through an array, one must be careful to test one's index variable rather than another similarly-named variable. The loop will read off the end of conf-disks[] in the following (pathological) case: % dd bs=1 seek=840716287 if=/dev/zero of=d1 count=1 % for i in 2 3 4; do dd

Re: mismatch_cnt questions

Bill Davidsen wrote: When last I looked at Hamming code, and that would be 1989 or 1990, I believe that I learned that the number of Hamming bits needed to cover N data bits was 1+log2(N), which for 512 bytes would be 1+12, and fit into a 16 bit field nicely. I don't know that I would go

Re: mismatch_cnt questions

H. Peter Anvin wrote: Bill Davidsen wrote: When last I looked at Hamming code, and that would be 1989 or 1990, I believe that I learned that the number of Hamming bits needed to cover N data bits was 1+log2(N), which for 512 bytes would be 1+12, and fit into a 16 bit field nicely. I don't

Changing partition types safe? raidtools to mdadm migration

I have a working RAID1 set. This is in a Gentoo system and I configured the RAID set using raidtools. I see that Raidtools are now deprecated in favor of mdadm. I installed mdadm, but it does not recognize my raid set. I tried the following command (note that my RAID set is active while I do

Re: Changing partition types safe? raidtools to mdadm migration

Neil, On 3/8/07, Neil Brown [EMAIL PROTECTED] wrote: On Thursday March 8, [EMAIL PROTECTED] wrote: I have a working RAID1 set. This is in a Gentoo system and I configured the RAID set using raidtools. I see that Raidtools are now deprecated in favor of mdadm. I installed mdadm, but it

Re: Changing partition types safe? raidtools to mdadm migration

Neil, On 3/8/07, Simon Matthews [EMAIL PROTECTED] wrote: Number Major Minor RaidDevice State 0 8 180 active sync /dev/sdb2 I missed one line from the above: 1 821 active sync /dev/sda2 Simon - To unsubscribe

Re: Raid 10 Problems?

Jan Engelhardt wrote: [] The other thing is, the bitmap is supposed to be written out at intervals, not at every write, so the extra head movement for bitmap updates should be really low, and not making the tar -xjf process slower by half a minute. Is there a way to tweak the

Re: Raid 10 Problems?

--- Michael Tokarev [EMAIL PROTECTED] wrote: Jan Engelhardt wrote: [] The other thing is, the bitmap is supposed to be written out at intervals, not at every write, so the extra head movement for bitmap updates should be really low, and not making the tar -xjf process slower by half a

Re: [PATCH] fix read past end of array in md/linear.c

Andy Isaacson wrote: When iterating through an array, one must be careful to test one's index variable rather than another similarly-named variable. The loop will read off the end of conf-disks[] in the following (pathological) case: % dd bs=1 seek=840716287 if=/dev/zero of=d1 count=1 % for

Re: [PATCH] fix read past end of array in md/linear.c

On Thu, Mar 08, 2007 at 09:37:46PM -0500, Bill Davidsen wrote: Andy Isaacson wrote: % dd bs=1 seek=840716287 if=/dev/zero of=d1 count=1 % for i in 2 3 4; do dd if=/dev/zero of=d$i bs=1k count=$(($i+150)); done [snip] -for (j=i; icnt-1 sz min_spacing ; j++) +for (j=i;