Mailinglist Archive: opensuse (880 mails)

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[opensuse] Slow file copying on openSUSE 12.3
  • From: Roger Oberholtzer <roger@xxxxxx>
  • Date: Wed, 14 Aug 2013 11:24:04 +0200
  • Message-id: <5530984.rG35Ustvy2@acme>
I have done an installation of a new openSUSE 12.3 system. Amongst the odd
problems I am having is slow file copying. It makes no difference what physical
drives are involved.

Copying an 80 MB takes 15-20 seconds. Bigger files taks correspondingly longer.
It makes no difference if the copy is to the same directory or to a different
partition or even a different disk.

On a different 12.3 install with similar (not the same) hardware, the copy
takes less than one second.

Copying over the network to a computer in another city is faster...

Copying to /dev/null is fast as expected. So it seems that it is the writing
to a disk part that is the issue.

The file systems are ext4 with the default settings used from installation.

The system has these disks:

[0:0:0:0] disk ATA WDC WD1000DHTZ-0 04.0 /dev/sda
[1:0:0:0] disk ATA WDC WD2000FYYZ-0 01.0 /dev/sdb

I see this in /var/log/messages,

scsi 0:0:0:0: Direct-Access ATA WDC WD1000DHTZ-0 04.0 PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 1953525168 512-byte logical blocks: (1.00 TB/931 GiB)
sd 0:0:0:0: [sda] 4096-byte physical blocks sd 0:0:0:0: [sda] Write Protect
is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support
DPO or FUA

scsi 1:0:0:0: Direct-Access ATA WDC WD2000FYYZ-0 01.0 PQ: 0 ANSI: 5
ACPI: Invalid Power Resource to register!
sd 1:0:0:0: [sdb] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
sd 1:0:0:0: [sdb] Write Protect is off
sd 1:0:0:0: [sdb] Mode Sense: 00 3a 00 00
sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support
DPO or FUA

sdb: sdb1
sd 1:0:0:0: [sdb] Attached SCSI disk
sda: sda1 sda2 sda3
sd 0:0:0:0: [sda] Attached SCSI disk

I do not see any complaints about the disks in the log file. To my eyes all
looks as expected. Except for the slow speed.

I am not sure what else to look at at this time. Anyone have any pointers?


--
Yours sincerely,

Roger Oberholtzer

Ramböll RST / Systems

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696
roger.oberholtzer@xxxxxxxxxx
________________________________________

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden
www.rambollrst.se
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