Re: suns raid-z / zfs

2008-02-18 Thread Neil Brown
On Monday February 18, [EMAIL PROTECTED] wrote: On Mon, Feb 18, 2008 at 03:07:44PM +1100, Neil Brown wrote: On Sunday February 17, [EMAIL PROTECTED] wrote: Hi It seems like a good way to avoid the performance problems of raid-5 /raid-6 I think there are better ways.

Re: RAID5 to RAID6 reshape?

2008-02-18 Thread Beolach
On Feb 17, 2008 10:26 PM, Janek Kozicki [EMAIL PROTECTED] wrote: Conway S. Smith said: (by the date of Sun, 17 Feb 2008 07:45:26 -0700) Well, I was reading that LVM2 had a 20%-50% performance penalty, huh? Make a benchmark. Do you really think that anyone would be using it if there was

Re: RAID5 to RAID6 reshape?

2008-02-18 Thread Andre Noll
On 17:40, Mark Hahn wrote: Question to other people here - what is the maximum partition size that ext3 can handle, am I correct it 4 TB ? 8 TB. people who want to push this are probably using ext4 already. ext3 supports up to 16T for quite some time. It works fine for me: [EMAIL

Re: RAID5 to RAID6 reshape?

2008-02-18 Thread Janek Kozicki
Beolach said: (by the date of Mon, 18 Feb 2008 05:38:15 -0700) On Feb 17, 2008 10:26 PM, Janek Kozicki [EMAIL PROTECTED] wrote: Conway S. Smith said: (by the date of Sun, 17 Feb 2008 07:45:26 -0700) Well, I was reading that LVM2 had a 20%-50% performance penalty,

Re: RAID5 to RAID6 reshape?

2008-02-18 Thread Mark Hahn
8 TB. people who want to push this are probably using ext4 already. ext3 supports up to 16T for quite some time. It works fine for me: thanks. 16 makes sense (2^32 * 4k blocks). - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL

Re: HDD errors in dmesg, but don't know why...

2008-02-18 Thread Justin Piszcz
Looks like your replacement disk is no good, the SATA port is bad or other issue. I am not sure what SDB FIS means but as long as you keep getting that error, don't expect the drive to work correctly, I had a drive that did a similar thing (DOA Raptor) and after I got the replacement it worked

HDD errors in dmesg, but don't know why...

2008-02-18 Thread Steve Fairbairn
Hi All, I've got a degraded RAID5 which I'm trying to add in the replacement disk. Trouble is, every time the recovery starts, it flies along at 70MB/s or so. Then after doing about 1%, it starts dropping rapidly, until eventually a device is marked failed. When I look in dmesg, I get the

Re: HDD errors in dmesg, but don't know why...

2008-02-18 Thread Jeff Garzik
Steve Fairbairn wrote: Hi All, I've got a degraded RAID5 which I'm trying to add in the replacement disk. Trouble is, every time the recovery starts, it flies along at 70MB/s or so. Then after doing about 1%, it starts dropping rapidly, until eventually a device is marked failed. When I look

Re: suns raid-z / zfs

2008-02-18 Thread Keld Jørn Simonsen
On Mon, Feb 18, 2008 at 09:51:15PM +1100, Neil Brown wrote: On Monday February 18, [EMAIL PROTECTED] wrote: On Mon, Feb 18, 2008 at 03:07:44PM +1100, Neil Brown wrote: On Sunday February 17, [EMAIL PROTECTED] wrote: Hi It seems like a good way to avoid the performance

Re: RAID5 to RAID6 reshape?

2008-02-18 Thread Peter Grandi
On Sun, 17 Feb 2008 07:45:26 -0700, Conway S. Smith [EMAIL PROTECTED] said: [ ... ] beolach Which part isn't wise? Starting w/ a few drives w/ the beolach intention of growing; or ending w/ a large array (IOW, beolach are 14 drives more than I should put in 1 array expect beolach to be safe