Re: Very slow SCSI throughput on Indy R4600
Thibaut VARENE wrote:
I've been trying several 2.4 debian kernels on my Indy (R4600), but I
still experience very slow SCSI throughput:
/dev/sda3:
Timing buffered disk reads: 8 MB in 3.42 seconds = 2.34 MB/sec
Hello Thibaut,
I own an indigo2 and also have poor hd performances:
---
mood-indigo:~# hdparm -tT /dev/sda1
/dev/sda1:
Timing buffer-cache reads: 104 MB in 2.08 seconds = 50.00 MB/sec
Timing buffered disk reads: 8 MB in 3.18 seconds = 2.52 MB/sec
---
I have to confess I use an IDE HD behind an SCSI to IDE adapter, so
this is not the very same setup than yours.
I'm trying to rebuild a 2.6 cvs kernel to see if that corrects the
problem (first attempt led me to a "no init found" error).
I think 2.6 does not boot on IP22 for now.
Here's the box cpuinfo:
[snip]
My box has slightly lower bogomips (74.75).
and the dmesg excerpt:
[snip]
Mine is very similar (same controller, same revisions)
Different systems, same SCSI controllers and same I/O performances.
Thibaut VARENE
The PA/Linux ESIEE Team
Conïncidence : I graduated from that school too.
Regards,
--
Vincent Stehlé
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