Messages in this thread | | | From | CIJOML <> | Subject | Very slow write on flash drive in sync mode??? | Date | Wed, 20 Sep 2006 20:58:05 +0200 |
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Hi,
I use SanDisk cruzer Titanium 2 GB mounted as sync in fstab
usb 4-2: new high speed USB device using ehci_hcd and address 5 usb 4-2: configuration #1 chosen from 1 choice scsi1 : SCSI emulation for USB Mass Storage devices usb-storage: device found at 5 usb-storage: waiting for device to settle before scanning Vendor: SanDisk Model: U3 Titanium Rev: 2.16 Type: Direct-Access ANSI SCSI revision: 02 SCSI device sda: 4001425 512-byte hdwr sectors (2049 MB) sda: Write Protect is off sda: Mode Sense: 03 00 00 00 sda: assuming drive cache: write through SCSI device sda: 4001425 512-byte hdwr sectors (2049 MB) sda: Write Protect is off sda: Mode Sense: 03 00 00 00 sda: assuming drive cache: write through sda: sda1 sd 1:0:0:0: Attached scsi removable disk sda sd 1:0:0:0: Attached scsi generic sg0 type 0 Vendor: SanDisk Model: U3 Titanium Rev: 2.16 Type: CD-ROM ANSI SCSI revision: 02 sr0: scsi3-mmc drive: 8x/40x writer xa/form2 cdda tray sr 1:0:0:1: Attached scsi CD-ROM sr0 sr 1:0:0:1: Attached scsi generic sg1 type 5 usb-storage: device scan complete
/dev/sda1 /mnt/cruzer_sync vfat user,noauto,sync 0 0 /dev/sda1 /mnt/cruzer auto user,noauto 0 0
When I use flash drive in sync mode, it writes on it only 64kB/s. When I umount it and mount it in not sync mode but do sync manually after it writes into memory, kernel writes on flash drive 11 MB/s!!! What is wrong in my configuration?
Kernel 2.6.18, Debian testing
Thanks for help
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