gorn
Group: Members
Posts: 3
Joined: Sep. 2005 |
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Posted: Sep. 11 2005,08:06 |
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Guys,
Need a little help with this one. Have a Dell D600 laptop with 2 40GB disk drives (1 internal, 1 in modular bay). I boot DSL via a USB stick and then use dd to copy the entire primary drive to the modular drive. Why? I travel a lot and cannot afford the downtime to reinstall / configure anything.
Problem is that performance of the copy via dd is unacceptably poor. It now takes around 10 hours to copy hda to hdc. I have experimented with changing block sizes and also booting DSL to RAM, but no notable improvement. Here is a little further information.
Maybe someone has had something similar to this. 15 years ago I was a UNIX admin, but in the meantime I have forgotten a hell of a lot.
root@0[cdrom]# uname -a
Linux box 2.4.26 #1 SMP Sa Apr 17 19:33:42 CEST 2004 i686 unknown
root@0[cdrom]# lscpi
0000:00:00.0 Host bridge: Intel Corp. 82855PM Processor to I/O Controller (rev 03)
0000:00:01.0 PCI bridge: Intel Corp. 82855PM Processor to AGP Controller (rev 03)
0000:00:1d.0 USB Controller: Intel Corp. 82801DB (ICH4) USB UHCI #1 (rev 01)
0000:00:1d.1 USB Controller: Intel Corp. 82801DB (ICH4) USB UHCI #2 (rev 01)
0000:00:1d.2 USB Controller: Intel Corp. 82801DB (ICH4) USB UHCI #3 (rev 01)
0000:00:1d.7 USB Controller: Intel Corp. 82801DB (ICH4) USB2 EHCI Controller (rev 01)
0000:00:1e.0 PCI bridge: Intel Corp. 82801BAM/CAM PCI Bridge (rev 81)
0000:00:1f.0 ISA bridge: Intel Corp. 82801DBM LPC Interface Controller (rev 01)
0000:00:1f.1 IDE interface: Intel Corp. 82801DBM (ICH4) Ultra ATA Storage Controller (rev 01)
0000:00:1f.5 Multimedia audio controller: Intel Corp. 82801DB (ICH4) AC'97 Audio Controller (rev 01)
0000:00:1f.6 Modem: Intel Corp. 82801DB (ICH4) AC'97 Modem Controller (rev 01)
0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 Lf [Radeon Mobility 9000 M9] (rev 02)
0000:02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5705M Gigabit Ethernet (rev 01)
0000:02:01.0 CardBus bridge: O2 Micro, Inc. OZ711EC1 SmartCardBus Controller (rev 20)
0000:02:01.1 CardBus bridge: O2 Micro, Inc. OZ711EC1 SmartCardBus Controller (rev 20)
0000:02:03.0 Network controller: Broadcom Corporation BCM94306 802.11g (rev 03)
root@0[cdrom]# hdparm -tT /dev/hda
/dev/hda:
Timing buffer-cache reads: 1532 MB in 2.00 seconds = 766.00 MB/sec
Timing buffered disk reads: 8 MB in 3.08 seconds = 2.60 MB/sec
root@0[cdrom]# hdparm -tT /dev/hdc
/dev/hdc:
Timing buffer-cache reads: 1528 MB in 2.00 seconds = 764.00 MB/sec
Timing buffered disk reads: 8 MB in 3.07 seconds = 2.61 MB/sec
root@0[cdrom]# time dd if=/dev/hda of=/dev/null bs=512 count=1953126
1953126+0 records in
1953126+0 records out
real 5m28.150s
user 0m0.690s
sys 4m4.080s
root@0[cdrom]# time dd if=/dev/hdc of=/dev/null bs=512 count=1953126
1953126+0 records in
1953126+0 records out
real 5m28.150s
user 0m0.690s
sys 4m4.080s
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