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OneInchMen
n00b
Joined: 30 Sep 2004
Posts: 70
Location: Tilburg, the Netherlands
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 Posted: Thu Sep 08, 2005 9:37 pm Post subject: [solved] Horrible USB2 speed (30-70KiB/s) |
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Hi there,
I have a couple of USB2 memory sticks. One where I can place a MMC/SD in and then use it as mass storage device and some conventional sticks from different brands. All sticks are USB 2.0 compatible.
All get recognised as usbdisk (/dev/sdx1) and automounted by Ivman at /media/usbdisk. However, I get a horrible transfer speed when copying something onto it... 30-70 KiB/s !!!
In Windhoos XP the devices reach up to 16 MB/s.
I looked everywhere in the kernel config, but I can't find anything wrong there...
Please let me know which part of my config (.config/dmesg/messages) do you need to help me! (don't let me boot windows!)
Thanx, Harold.
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Last edited by OneInchMen on Sat Sep 10, 2005 12:08 pm; edited 1 time in total |
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widan
Veteran
Joined: 07 Jun 2005
Posts: 1512
Location: Paris, France
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| Posted: Fri Sep 09, 2005 12:37 am Post subject: |
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| Check that it's not mounted sync, as that can slow down writes a lot (only writes, not reads). Look here. |
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OneInchMen
n00b
Joined: 30 Sep 2004
Posts: 70
Location: Tilburg, the Netherlands
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| Posted: Fri Sep 09, 2005 6:45 am Post subject: |
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I also have an other computer at home (an old P3 HP eVectra, used as server). It has the same udev version and configuration. It only has a USB 1.1 controller but I get speeds up to 4 MB/s there.
However, I will try and see if the change in the udev settings changes anything on my desktop pc...
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Last edited by OneInchMen on Fri Sep 09, 2005 11:34 am; edited 1 time in total |
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Stolz
Moderator
Joined: 19 Oct 2003
Posts: 3028
Location: Hong Kong
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| Posted: Fri Sep 09, 2005 10:35 am Post subject: |
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Check the link widan has provided you.
Also, you can try this config:
| Code: | Device Drivers -->
SCSI Device Support
[M] SCSI device support (scsi_mod)
[*]Legacy /proc/scsi/ support
[M]SCSI disk support (sd_mod)
Device Drivers -->
USB Support
[M] EHCI HCD (USB 2.0) support
[*] Full speed ISO transactions (EXPERIMENTAL)
[M] USB Mass Storage (usb_storage)
[*] USB Mass Storage Write-Protected Media Detection
[*] Microtech/ZiO! CompactFlash/SmartMedia support
File Systems -->
DOS/FAT/NT Filesystems
DOS FAT fs support (fat)
MSDOS fs support (msdos) |
For me, the 'magic' option was "[*] Full speed ISO transactions (EXPERIMENTAL)"
Hope it helps. |
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Tanisete
Guru
Joined: 12 Mar 2004
Posts: 312
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| Posted: Fri Sep 09, 2005 1:45 pm Post subject: |
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| I would think its the sync option too. It's default option in hal for storage devices under 2 GB. Look at your hal storage policy. It may help! |
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OneInchMen
n00b
Joined: 30 Sep 2004
Posts: 70
Location: Tilburg, the Netherlands
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| Posted: Sat Sep 10, 2005 12:09 pm Post subject: |
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Yep... The sync option did it...
I hope I remember to manually 'sync' before unplugging...
However I find it very strange that my other pc doesn'n need this option to write at a decent speed... 
Thanx!
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