[CentOS] Strangely slow disk

[Ho Chaw Ming]

Check your bios, and make sure that you did not have IDE mode enabled and
AHCI is selected .

-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf
Of Timothy Murphy
Sent: Sunday, 4 December, 2011 8:46 PM
To: centos at centos.org
Subject: [CentOS] Strangely slow disk

I have a 1.5TB Western Digital hard disk (WD15EADS-00R6B0) on my CentOS-5.7
server, which has become incredibly slow for some operations, eg rsync,
BackupPC archive, e2fsck, although it seems to work fine for ordinary file
operations, and "smartctl -a /dev/sdb" does not report any errors.

For example, running "e2fsck -p /dev/sdb5" on a 250GB partition on this disk
took over 24 hours to complete, as it did on another partition.

I wonder if anyone can offer an explanation, or suggest a remedy?


--
Timothy Murphy
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College Dublin


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