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> Sd Card Very Slow Oz 3.5.4.1, (almost unusable) -> Solved
henrysviper
post Jan 19 2007, 10:37 AM
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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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Meanie
post Jan 20 2007, 03:25 AM
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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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poorman
post Jan 24 2007, 01:51 PM
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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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stupkid
post Jan 24 2007, 03:17 PM
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The "noatime" mount option also improves performance on most every file system.
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speculatrix
post Jan 24 2007, 03:20 PM
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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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henrysviper
post Jan 31 2007, 02:31 PM
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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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Meanie
post Jan 31 2007, 10:14 PM
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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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koen
post Jan 31 2007, 10:44 PM
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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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speculatrix
post Feb 1 2007, 02:27 AM
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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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Meanie
post Feb 1 2007, 03:05 AM
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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 sad.gif
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speculatrix
post Feb 1 2007, 03:31 AM
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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 sad.gif
*



<koen mode>
did you post to the bugtracker? forums are not bugtrackers
</koen mode>
wink.gif
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Meanie
post Feb 1 2007, 04:14 AM
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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 sad.gif
*



<koen mode>
did you post to the bugtracker? forums are not bugtrackers
</koen mode>
wink.gif
*



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