On Sat, 26 Dec 1998, Eyal Lebedinsky wrote:
> Good point. Here is what I get (with vmstat, MB/sec)
> 1 disk1400
> 2 disks 2400
> 3 disks 3000
> 4 disks 3200
> then no more improvement.
> Direct-Access ANSI SCSI revisi
[EMAIL PROTECTED] wrote:
>Eyal Lebedinsky wrote:
>> the disks seem to be slow on their own
>> (hdparm says 1.36 MB/sec) and I expected some speedup when striped
>> (raid0). I got 2.8 MB/sec,
> Perhaps check that you can get more than 2.8MB/sec across the bus when running the
>discs as six/n separ
>From the Software-RAID-2.html
" ...
RAID-0 is much like RAID-linear, except that the component partitions
are divided into stripes and then interleaved. Like RAID-linear, the
result is a single larger virtual partition.
RAID-1 is also referred to as "mirroring". Two (or more) partitions, al
"David Harris" wrote:
>Eyal Lebedinsky wrote:
>> the disks seem to be slow on their own
>> (hdparm says 1.36 MB/sec) and I expected some speedup when striped
>> (raid0). I got 2.8 MB/sec,
>
>You mention that you are trying to achieve a read speed boost from
>"striping", but then mentioned that you
Hi,
Forget that. I'm an idiot.
Raid1 is mirroring, Raid0 is striping.
Sorry for the screw up.
- David Harris
Principal Engineer, DRH Internet Services
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of David Harris
Sent: Saturday, December 26,
Hi,
Eyal Lebedinsky wrote:
> I am now studying the RAID implementation. For starters I attached some
> discarded sun disks (6x200MB QUANTUM Model: PD210S SUN0207 Rev: 492S)
> and set to measure the results. the disks seem to be slow on their own
> (hdparm says 1.36 MB/sec) and I expect
I am trying to understand the use of this parameter. It says that this
is
the size of a continuous chunk of data on one disk. So I guess one would
want to make it small, spreading data accross disks to gain performance
from the striping.
But this does not seem to be the case. A minimal reasonable
