 Sd Card Very Slow Oz 3.5.4.1, (almost unusable) -> Solved |
OESF Forums > Distros, Development, and Model Specific Forums > Distro Support and Discussion > Angstrom & OpenZaurus  |
 Jan 19 2007, 10:37 AM
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#1
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 Group: Members Posts: 76 Joined: 4-May 04 From: Athens, Greece Member No.: 3,136  |
I finally found the time today to install OZ 3.5.4.1 (GPE) on my C750. I am very impressed with the result. It is evident that a lot of work has been put in this version.
I have however a problem that renders my installation almost unusable. My SD card, a Toshiba 512 MB, is extremely slow: read speed is around 300 KB/sec and write speed is around 20 KB/sec. The card was working perfectly on older versions of OZ (and pdaxrom). The card has one partition with the ext2 fs. I tried recreating the partition and the filesystem but I didn't see any improvement. The card seems to be working (tested in a cardreader and also I don't see any relevant messages in dmesg output). Is there a way to improve its speed in OZ? |
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Jan 20 2007, 03:25 AM
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#2
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 Group: Members Posts: 2,808 Joined: 21-March 05 From: Sydney, Australia Member No.: 6,686 |
QUOTE(henrysviper @ Jan 20 2007, 04:37 AM) I finally found the time today to install OZ 3.5.4.1 (GPE) on my C750. I am very impressed with the result. It is evident that a lot of work has been put in this version. I have however a problem that renders my installation almost unusable. My SD card, a Toshiba 512 MB, is extremely slow: read speed is around 300 KB/sec and write speed is around 20 KB/sec. The card was working perfectly on older versions of OZ (and pdaxrom). The card has one partition with the ext2 fs. I tried recreating the partition and the filesystem but I didn't see any improvement. The card seems to be working (tested in a cardreader and also I don't see any relevant messages in dmesg output). Is there a way to improve its speed in OZ?  mount the sd with async option |
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Jan 24 2007, 01:51 PM
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#3
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Group: Members Posts: 13 Joined: 12-November 04 Member No.: 5,433 |
QUOTE(Meanie @ Jan 20 2007, 11:25 AM) QUOTE(henrysviper @ Jan 20 2007, 04:37 AM) I finally found the time today to install OZ 3.5.4.1 (GPE) on my C750. I am very impressed with the result. It is evident that a lot of work has been put in this version. I have however a problem that renders my installation almost unusable. My SD card, a Toshiba 512 MB, is extremely slow: read speed is around 300 KB/sec and write speed is around 20 KB/sec. The card was working perfectly on older versions of OZ (and pdaxrom). The card has one partition with the ext2 fs. I tried recreating the partition and the filesystem but I didn't see any improvement. The card seems to be working (tested in a cardreader and also I don't see any relevant messages in dmesg output). Is there a way to improve its speed in OZ? mount the sd with async option Indeed, it works. I had the same problem with OZ 3.5.4.2 on Tosa with Lexar 1GB SD card. With 'sync' it did 1,2MB/s read and 50KB/s write copared to 1,3Mb/s read/write with 'async'. Thank Meanie for help! Cheers, pm |
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Jan 24 2007, 03:17 PM
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#4
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 Group: Members Posts: 578 Joined: 2-January 04 From: Texas USA Member No.: 1,324 |
The "noatime" mount option also improves performance on most every file system.
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Jan 24 2007, 03:20 PM
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#5
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 Group: Admin Posts: 3,277 Joined: 29-July 04 From: Cambridge, England Member No.: 4,149 |
QUOTE(stupkid @ Jan 25 2007, 12:17 AM) The "noatime" mount option also improves performance on most every file system. ... and will reduce wear |
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Jan 31 2007, 02:31 PM
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#6
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Group: Members Posts: 76 Joined: 4-May 04 From: Athens, Greece Member No.: 3,136 |
The "async" option was indeed the solution! (actually async is the default so deleting the sync option from /etc/fstab is enough).
Stupid of me not to think of it. Thanks everybody. Shouldn't async be the default? |
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Jan 31 2007, 10:14 PM
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#7
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Group: Members Posts: 2,808 Joined: 21-March 05 From: Sydney, Australia Member No.: 6,686 |
QUOTE(henrysviper @ Feb 1 2007, 08:31 AM) The "async" option was indeed the solution! (actually async is the default so deleting the sync option from /etc/fstab is enough). Stupid of me not to think of it. Thanks everybody. Shouldn't async be the default? yeah I reckon. it annoyed the hell out of me when it took ages to copy a tiny file.... |
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Jan 31 2007, 10:44 PM
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#8
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 Group: Members Posts: 1,014 Joined: 4-January 05 From: Enschede, The Netherlands Member No.: 6,107 |
QUOTE(Meanie @ Feb 1 2007, 06:14 AM) QUOTE(henrysviper @ Feb 1 2007, 08:31 AM) The "async" option was indeed the solution! (actually async is the default so deleting the sync option from /etc/fstab is enough). Stupid of me not to think of it. Thanks everybody. Shouldn't async be the default? yeah I reckon. it annoyed the hell out of me when it took ages to copy a tiny file.... We've had too many users pulling out sd cards when they thought it was 'done', but linux has still copying files behind their backs. Users love data-loss |
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Feb 1 2007, 02:27 AM
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#9
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Group: Admin Posts: 3,277 Joined: 29-July 04 From: Cambridge, England Member No.: 4,149 |
QUOTE(koen @ Feb 1 2007, 07:44 AM) We've had too many users pulling out sd cards when they thought it was 'done', but linux has still copying files behind their backs. Users love data-loss surely they should know to use the eject function in the applet? |
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Feb 1 2007, 03:05 AM
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#10
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Group: Members Posts: 2,808 Joined: 21-March 05 From: Sydney, Australia Member No.: 6,686 |
QUOTE(speculatrix @ Feb 1 2007, 08:27 PM) QUOTE(koen @ Feb 1 2007, 07:44 AM) We've had too many users pulling out sd cards when they thought it was 'done', but linux has still copying files behind their backs. Users love data-loss surely they should know to use the eject function in the applet? It doesn't work in the latest version of OZ 
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 Feb 1 2007, 03:31 AM
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#11
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Group: Admin Posts: 3,277 Joined: 29-July 04 From: Cambridge, England Member No.: 4,149 |
QUOTE(Meanie @ Feb 1 2007, 12:05 PM) QUOTE(Speculatrix) surely they should know to use the eject function in the applet? It doesn't work in the latest version of OZ <koen mode> did you post to the bugtracker? forums are not bugtrackers </koen mode> 
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Feb 1 2007, 04:14 AM
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#12
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Group: Members Posts: 2,808 Joined: 21-March 05 From: Sydney, Australia Member No.: 6,686 |
QUOTE(speculatrix @ Feb 1 2007, 09:31 PM) QUOTE(Meanie @ Feb 1 2007, 12:05 PM) QUOTE(Speculatrix) surely they should know to use the eject function in the applet? It doesn't work in the latest version of OZ <koen mode> did you post to the bugtracker? forums are not bugtrackers </koen mode> of course I logged a bug against it in one or two of their many bug tracking systems, but .... |
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