Brian,
My information (I assume) reflects a sustainable transfer rate between disk
buffers and central memory. We both know there's a lot more to disk I/O
than buffer transfers.
I am building a web service based on RH Linux 6.0. I'm using a 450 MHz
Pentium II w/ .5GB.
I have invested in two WD AC91000D 9.1GB UDMA/66 drives spinning at 7200
with 2MB buffers.
When my motherboard supports UDMA/66 I will have done as well as my budget
allows.
My purpose in monitoring this group is to try to figure out how to migrate
to a full Raid-1 configuration (all partitions) using these two drives. I
also need to understand recovery procedures for various failure scenarios.
There seem to be so many variants of software raid configurations that I
find it difficult to determine what documentation/advise applies to me. I
wish there was a "Migration to Full Software Raid-1 with Recovery Scenarios
HOWTO".
Any advise will be appreciated!
Thanks,
Joel Fowler
==========================
> Joel,
>
>I have also tested what your reporting here:
>
>> UDMA/33-66 drive with IDE cables = 12MB/s.
>> UDMA/33 drive with UDMA/66 cables = 33MB/s.
>
>I have used standard and the UDMA/66 cables and they both get the same
>performance. The drives are not able to sustain more then about
>12-18MB/sec on block IO.... They can burst to bus speed(33 or 66) but
>not sustain it. No vendor even claims this...
>--
>=================================================
>Brian D. Haymore, Systems Administrator
>Center for High Performance Computing, U of Utah
>Email: [EMAIL PROTECTED], Phone: (801) 585-1755
>=================================================
>
