OESF Portables Forum

Everything Else => Zaurus Distro Support and Discussion => Distros, Development, and Model Specific Forums => Archived Forums => Angstrom & OpenZaurus => Topic started by: henrysviper on January 19, 2007, 01:37:48 pm

Title: Sd Card Very Slow Oz 3.5.4.1
Post by: henrysviper on January 19, 2007, 01:37:48 pm
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?
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: Meanie on January 20, 2007, 06:25:15 am
Quote
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?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=151700\"][{POST_SNAPBACK}][/a][/div]

mount the sd with async option
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: poorman on January 24, 2007, 04:51:31 pm
Quote
Quote
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?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=151700\"][{POST_SNAPBACK}][/a][/div]

mount the sd with async option
[div align=\"right\"][a href=\"index.php?act=findpost&pid=151791\"][{POST_SNAPBACK}][/a][/div]

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
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: stupkid on January 24, 2007, 06:17:58 pm
The "noatime" mount option also improves performance on most every file system.
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: speculatrix on January 24, 2007, 06:20:38 pm
Quote
The "noatime" mount option also improves performance on most every file system.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=152308\"][{POST_SNAPBACK}][/a][/div]

... and will reduce wear
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: henrysviper on January 31, 2007, 05:31:14 pm
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?
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: Meanie on February 01, 2007, 01:14:03 am
Quote
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?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153092\"][{POST_SNAPBACK}][/a][/div]

yeah I reckon. it annoyed the hell out of me when it took ages to copy a tiny file....
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: koen on February 01, 2007, 01:44:43 am
Quote
Quote
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?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153092\"][{POST_SNAPBACK}][/a][/div]

yeah I reckon. it annoyed the hell out of me when it took ages to copy a tiny file....
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153162\"][{POST_SNAPBACK}][/a][/div]

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
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: speculatrix on February 01, 2007, 05:27:10 am
Quote
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
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153164\"][{POST_SNAPBACK}][/a][/div]

surely they should know to use the eject function in the applet?
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: Meanie on February 01, 2007, 06:05:06 am
Quote
Quote
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
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153164\"][{POST_SNAPBACK}][/a][/div]

surely they should know to use the eject function in the applet?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153186\"][{POST_SNAPBACK}][/a][/div]

It doesn't work in the latest version of OZ
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: speculatrix on February 01, 2007, 06:31:51 am
Quote
Quote
surely they should know to use the eject function in the applet?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153186\"][{POST_SNAPBACK}][/a][/div]

It doesn't work in the latest version of OZ
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153189\"][{POST_SNAPBACK}][/a][/div]

<koen mode>
did you post to the bugtracker? forums are not bugtrackers
</koen mode>
 
Title: Sd Card Very Slow Oz 3.5.4.1
Post by: Meanie on February 01, 2007, 07:14:40 am
Quote
Quote
Quote
surely they should know to use the eject function in the applet?
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153186\"][{POST_SNAPBACK}][/a][/div]

It doesn't work in the latest version of OZ
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153189\"][{POST_SNAPBACK}][/a][/div]

<koen mode>
did you post to the bugtracker? forums are not bugtrackers
</koen mode>
 
[div align=\"right\"][a href=\"index.php?act=findpost&pid=153191\"][{POST_SNAPBACK}][/a][/div]

of course I logged a bug against it in one or two of their many bug tracking systems, but ....