Re: slow 'check'

2007-02-14 Thread Bill Davidsen
Raz Ben-Jehuda(caro) wrote: I suggest you test all drives concurrently with dd. load dd on sda , then sdb slowly one after the other and see whether the throughput degrades. use iostat. furtheremore, dd is not the measure for random access. AFAIK 'check' does no do random access, which was the or

Re: slow 'check'

2007-02-11 Thread Raz Ben-Jehuda(caro)
I suggest you test all drives concurrently with dd. load dd on sda , then sdb slowly one after the other and see whether the throughput degrades. use iostat. furtheremore, dd is not the measure for random access. On 2/10/07, Bill Davidsen <[EMAIL PROTECTED]> wrote: Justin Piszcz wrote: > > > On

Re: slow 'check'

2007-02-10 Thread Bill Davidsen
Justin Piszcz wrote: On Sat, 10 Feb 2007, Eyal Lebedinsky wrote: Justin Piszcz wrote: On Sat, 10 Feb 2007, Eyal Lebedinsky wrote: I have a six-disk RAID5 over sata. First two disks are on the mobo and last four are on a Promise SATA-II-150-TX4. The sixth disk was added recently and I dec

Re: slow 'check'

2007-02-10 Thread Bill Davidsen
Raz Ben-Jehuda(caro) wrote: On 2/10/07, Eyal Lebedinsky <[EMAIL PROTECTED]> wrote: I have a six-disk RAID5 over sata. First two disks are on the mobo and last four are on a Promise SATA-II-150-TX4. The sixth disk was added recently and I decided to run a 'check' periodically, and started one ma

Re: slow 'check'

2007-02-10 Thread Justin Piszcz
On Sat, 10 Feb 2007, Eyal Lebedinsky wrote: Justin Piszcz wrote: On Sat, 10 Feb 2007, Eyal Lebedinsky wrote: I have a six-disk RAID5 over sata. First two disks are on the mobo and last four are on a Promise SATA-II-150-TX4. The sixth disk was added recently and I decided to run a 'check'

Re: slow 'check'

2007-02-10 Thread Eyal Lebedinsky
Justin Piszcz wrote: > > > On Sat, 10 Feb 2007, Eyal Lebedinsky wrote: > >> I have a six-disk RAID5 over sata. First two disks are on the mobo and >> last four >> are on a Promise SATA-II-150-TX4. The sixth disk was added recently >> and I decided >> to run a 'check' periodically, and started on

Re: slow 'check'

2007-02-10 Thread Eyal Lebedinsky
Raz Ben-Jehuda(caro) wrote: > On 2/10/07, Eyal Lebedinsky <[EMAIL PROTECTED]> wrote: > >> I have a six-disk RAID5 over sata. First two disks are on the mobo and >> last four >> are on a Promise SATA-II-150-TX4. The sixth disk was added recently >> and I decided >> to run a 'check' periodically, an

Re: slow 'check'

2007-02-10 Thread Justin Piszcz
On Sat, 10 Feb 2007, Eyal Lebedinsky wrote: I have a six-disk RAID5 over sata. First two disks are on the mobo and last four are on a Promise SATA-II-150-TX4. The sixth disk was added recently and I decided to run a 'check' periodically, and started one manually to see how long it should tak

Re: slow 'check'

2007-02-09 Thread Raz Ben-Jehuda(caro)
On 2/10/07, Eyal Lebedinsky <[EMAIL PROTECTED]> wrote: I have a six-disk RAID5 over sata. First two disks are on the mobo and last four are on a Promise SATA-II-150-TX4. The sixth disk was added recently and I decided to run a 'check' periodically, and started one manually to see how long it sh

slow 'check'

2007-02-09 Thread Eyal Lebedinsky
I have a six-disk RAID5 over sata. First two disks are on the mobo and last four are on a Promise SATA-II-150-TX4. The sixth disk was added recently and I decided to run a 'check' periodically, and started one manually to see how long it should take. Vanilla 2.6.20. A 'dd' test shows: # dd if=/