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snvv
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Post subject: Very slow usb HD [solved]
 Posted: 11.10.2010, 11:40
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Joined: 2010-09-13
Posts: 270
Status: Offline
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Recently my external USB driver becomes very slow.
It used to transfer data with 10-15 MB/s.
Now when I transfer large files seems to be stuck.
The disk is a SUMSUNG F1 1TB, used only for buckup.
I used smartmontools and the disk seems ok.
but
Quote:
hdparm -t /dev/sdb1
/dev/sdb1:
Timing buffered disk reads: 4 MB in 4.35 seconds = 941.28 kB/sec
It is much lower than in the past....
Probably that is a USB issue. Seems like USB1.1 and not USB2.
Any idea about this problem please?
Thank you
snvv
EDIT: some more info
Code:
hdparm /dev/sdb
/dev/sdb:
SG_IO: bad/missing sense data, sb[]: 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
multcount = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 77825/255/63, sectors = 1250263728, start = 0
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Last edited by snvv on 13.10.2010, 13:32; edited 2 times in total
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towo
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Post subject:
Posted: 11.10.2010, 12:05
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Joined: 2010-09-13
Posts: 488
Location: Pößneck / Thüringen
Status: Offline
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Quote:
Probably that is a USB issue. Seems like USB1.1 and not USB2.
Paste the relevant info from dmesg. |
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snvv
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Post subject:
Posted: 11.10.2010, 12:50
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Joined: 2010-09-13
Posts: 270
Status: Offline
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towo
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Post subject:
Posted: 11.10.2010, 12:52
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Joined: 2010-09-13
Posts: 488
Location: Pößneck / Thüringen
Status: Offline
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Code:
[ 41.505037] usb 3-3: new full speed USB device using ohci_hcd and address 2
This does not look like usb 1.1, the system is seeing and using usb 2. |
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snvv
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Post subject:
Posted: 11.10.2010, 12:59
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Joined: 2010-09-13
Posts: 270
Status: Offline
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So what could be the problem?.
I have the issue in two external disks (1TB & 640GB) just retested.
Is it possible to find an older aptosid or sidux kernel?
Using apt I can get the latest only. |
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towo
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Post subject:
Posted: 11.10.2010, 13:02
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Joined: 2010-09-13
Posts: 488
Location: Pößneck / Thüringen
Status: Offline
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| There is no archive for older kernel. |
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devil
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Post subject:
Posted: 11.10.2010, 13:58
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Joined: 2010-08-26
Posts: 491
Location: Berlin
Status: Offline
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as noone else has these probs, i dont think an older version or kernel would help. (specialy it being on 2 disks)
atm i have no idea what the prob could be.
greetz
devil |
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blackhole
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Post subject:
Posted: 11.10.2010, 14:39
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Joined: 2010-09-12
Posts: 110
Status: Offline
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| Did you try to change cable? |
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HeSaid
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Post subject:
Posted: 11.10.2010, 14:54
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Moderator
Joined: 2010-09-11
Posts: 56
Location: southwest Florida, USA
Status: Offline
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Can you boot from a live DVD and retest?
--
Neal |
_________________
Registered Linux User # 159445
aptosid 64-bit Lenovo Thinkpad Edge
aptosid 64-bit HP dv6000 laptop
aptosid 32-bit eeePC 900A
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snvv
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Post subject:
Posted: 11.10.2010, 20:10
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Joined: 2010-09-13
Posts: 270
Status: Offline
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blackhole I tried two different cables.
HeSaid Yes I tried and the outcome is about the same.
I am going to use a sata connector and I will use the disk with e-sata. I will report latter if I have any improvement in this situation.
Thank you for the help
snvv |
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finotti
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Post subject:
Posted: 12.10.2010, 11:50
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Joined: 2010-09-12
Posts: 242
Status: Offline
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snvv wrote:
HeSaid Yes I tried and the outcome is about the same.
If it used to work well with aptosid and it doesn't work well with the live CD, then it seems that it is a hardware problem. Unless you hadn't DUed in a long time. In that case you could try an old sidux live CD.
Or maybe I am way off... (It seems to happen a lot.)
Good luck,
Luis |
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snvv
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Post subject:
Posted: 12.10.2010, 12:59
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Joined: 2010-09-13
Posts: 270
Status: Offline
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Thank you
Tomorrow I will know if it is a hardware problem or not.
I am going to get a e-sata cable to test the disks.
Using various tests the disks seems to be healthy, (any way they are not old and used only for backup). |
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snvv
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Post subject:
Posted: 12.10.2010, 17:46
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Joined: 2010-09-13
Posts: 270
Status: Offline
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Ok it is a usb problem.
I connected the 1TB drive with 2m long e-sata cable.
Quote:
hdparm -t /dev/sdb1
/dev/sdb1:
Timing buffered disk reads: 414 MB in 3.00 seconds = 137.90 MB/sec
root@aptosid:/media# hdparm -t /dev/sdb2
/dev/sdb2:
Timing buffered disk reads: 394 MB in 3.00 seconds = 131.28 MB/sec
How can automount the drive?
When I select it in Dolphin I get
Quote:
"an error occurred while accessing "MyData". The system responded: org.freedesktop.Hal.Device.VolumePermissionDenied: Refusing to mount device /dev/sdb2 for uid=1001"
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Sordon
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Post subject:
Posted: 13.10.2010, 08:59
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Joined: 2010-09-13
Posts: 50
Status: Offline
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| The information provided here helped me with this problem on my machine. |
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snvv
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Post subject:
Posted: 13.10.2010, 13:35
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Joined: 2010-09-13
Posts: 270
Status: Offline
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Ok that was a bios problem.
I reset the bios in fail-safe mode and now the transfer rates increased to 20-25 MB/s.
Thank you for the help.
snvv |
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