From: CIJOML <cijoml@volny.cz>
To: linux-kernel@vger.kernel.org
Subject: Very slow write on flash drive in sync mode???
Date: Wed, 20 Sep 2006 20:58:05 +0200 [thread overview]
Message-ID: <200609202058.05816.cijoml@volny.cz> (raw)
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
Michal
next reply other threads:[~2006-09-20 18:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-20 18:58 CIJOML [this message]
2006-09-20 19:13 ` Tomasz Torcz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200609202058.05816.cijoml@volny.cz \
--to=cijoml@volny.cz \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®