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Re: [opensuse] Slow file copying on openSUSE 12.3
  • From: Greg Freemyer <greg.freemyer@xxxxxxxxx>
  • Date: Wed, 14 Aug 2013 07:27:51 -0400
  • Message-id: <CAGpXXZKemwkUysg-n=ZP1=0uG_2YxzNkXLb_S6UzwCtjfbU=2Q@mail.gmail.com>
On Wed, Aug 14, 2013 at 6:37 AM, Roger Oberholtzer <roger@xxxxxx> wrote:
A bit more information. On the slow system:

# hdparm -Tt /dev/sdb

/dev/sdb:
Timing cached reads: 27784 MB in 1.99 seconds = 13934.26 MB/sec
Timing buffered disk reads: 468 MB in 3.01 seconds = 155.63 MB/sec

# hdparm -Tt /dev/sda

/dev/sda:
Timing cached reads: 27776 MB in 1.99 seconds = 13930.08 MB/sec
Timing buffered disk reads: 584 MB in 3.00 seconds = 194.66 MB/sec

On a system acting as expected:

# hdparm -Tt /dev/sdb
/dev/sdb:
Timing cached reads: 6852 MB in 2.00 seconds = 3427.26 MB/sec
Timing buffered disk reads: 312 MB in 3.01 seconds = 103.56 MB/sec

So at this level they seem to be okay. Not sure what this tells us.

Look in /var/log/warnng for media errors on the drives. That can
really slow things down.

If nothing you're going to have to tell us about the storage stack at
a minimum. (volumes / raid / filesystem type)

Greg
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