[Bug 746670] New: extremely slow file copying on USB flash memory
https://bugzilla.novell.com/show_bug.cgi?id=746670 https://bugzilla.novell.com/show_bug.cgi?id=746670#c0 Summary: extremely slow file copying on USB flash memory Classification: openSUSE Product: openSUSE 12.1 Version: Final Platform: i686 OS/Version: openSUSE 12.1 Status: NEW Severity: Major Priority: P5 - None Component: Other AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: crossblade@inbox.lv QAContact: qa@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:11.0) Gecko/20100101 Firefox/11.0 When I copy photos/videos (any other files) after first seconds speed falls to couple kbps and system hangs on. after some minutes(!) speed is ok again for couple second and than again falls. And this "waves" I have all the time... Just impossible to copy 1Gb of photos on USB flash... Reproducible: Always Steps to Reproduce: 1.take a lot of photos 2.plug USB flash memory 3.copy files to USB memory Actual Results: impossible to use system, timer shows that files will be copied on flash after some days(!) Expected Results: speed should be about 2-6MB/s -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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kk zhang
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Jeff Mahoney
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Vadim Krasovsky
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Jeff Mahoney
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Oliver Neukum
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--- Comment #5 from Vadim Krasovsky
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--- Comment #6 from Oliver Neukum
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--- Comment #7 from Vadim Krasovsky
We may be driving the sector management in the drive into the worst case. lets do it! (if I've got you correctly)
Did you partition the device yourself? formatted it in win XP (fat32)
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--- Comment #8 from Oliver Neukum
(In reply to comment #6)
We may be driving the sector management in the drive into the worst case. lets do it! (if I've got you correctly)
On a SCSI level your device pretends to have a sector size of 512bytes. This is most likely a lie. Writing small amounts of data is very inefficient on an SSD.
Did you partition the device yourself? formatted it in win XP (fat32)
It is possible that XP doesn't generate an optimal partitioning. Please attach the output of "fdisk -l /dev/sdX" (X to be replaced with the letter of your device) -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.
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Andreas Nordal
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