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When mdadm creates a raid5 array, it creates it in degraded mode. Then it kicks
in the last device and runs the rebuild code, which reads from the other n-1
disks and writes to the nth disk as appropriate to satisfy parity requirements.
This allows
On Thu May 10, 2007 at 05:33:17PM -0400, Justin Piszcz wrote:
>
>
> On Thu, 10 May 2007, Liang Yang wrote:
>
> >Hi,
> >
> >I created a MD-RAID5 array using 8 Maxtor SAS Disk Drives (chunk size is
> >256k). I have measured the data transfer speed for single SAS disk drive
> >(physical drive, n
on in each disk platter?
Thanks,
Liang
- Original Message - From: "Justin Piszcz" <[EMAIL PROTECTED]>
To: "Liang Yang" <[EMAIL PROTECTED]>
Cc:
Sent: Thursday, May 10, 2007 2:33 PM
Subject: Re: Questions about the speed when MD-RAID array is being
initiali
;[EMAIL PROTECTED]>
Cc:
Sent: Thursday, May 10, 2007 2:33 PM
Subject: Re: Questions about the speed when MD-RAID array is being
initialized.
On Thu, 10 May 2007, Liang Yang wrote:
Hi,
I created a MD-RAID5 array using 8 Maxtor SAS Disk Drives (chunk size is
256k). I have measured the da
On Thu, 10 May 2007, Liang Yang wrote:
Hi,
I created a MD-RAID5 array using 8 Maxtor SAS Disk Drives (chunk size is
256k). I have measured the data transfer speed for single SAS disk drive
(physical drive, not filesystem on it), it is roughly about 80~90MB/s.
However, I notice MD also rep
Hi,
I created a MD-RAID5 array using 8 Maxtor SAS Disk Drives (chunk size is
256k). I have measured the data transfer speed for single SAS disk drive
(physical drive, not filesystem on it), it is roughly about 80~90MB/s.
However, I notice MD also reports the speed for the RAID5 array when it
