#!/usr/bin/alex

Hello, maybe if you have an Asus eeepc this can sound familiar:

[ 2948.736927] sd 2:0:0:0: [sdb] 1984000 512-byte hardware sectors (1016 MB)
[ 2948.741932] sd 2:0:0:0: [sdb] Write Protect is off
[ 2948.741951] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ 2948.741959] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 2948.751918] sd 2:0:0:0: [sdb] 1984000 512-byte hardware sectors (1016 MB)
[ 2948.754938] sd 2:0:0:0: [sdb] Write Protect is off
[ 2948.754957] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ 2948.754964] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 2948.754980] sdb: sdb1
[ 2984.386913] sd 2:0:0:0: [sdb] Device not ready: Sense Key : Not Ready [current]
[ 2984.386941] sd 2:0:0:0: [sdb] Device not ready: Add. Sense: Medium not present
[ 2984.386959] end_request: I/O error, dev sdb, sector 1983984
[ 2984.386975] Buffer I/O error on device sdb, logical block 247998
[ 2984.407911] sd 2:0:0:0: [sdb] Device not ready: Sense Key : Not Ready [current]
[ 2984.407936] sd 2:0:0:0: [sdb] Device not ready: Add. Sense: Medium not present
[ 2984.407953] end_request: I/O error, dev sdb, sector 1983984
[ 2984.407966] Buffer I/O error on device sdb, logical block 247998
[ 2984.408153] Buffer I/O error on device sdb, logical block 0
[ 2984.408186] Buffer I/O error on device sdb, logical block 0
[ 2984.408229] Buffer I/O error on device sdb, logical block 0
[ 2984.408296] Buffer I/O error on device sdb, logical block 247999
[ 2984.408341] Buffer I/O error on device sdb, logical block 247999
[ 2984.408382] Buffer I/O error on device sdb, logical block 247999
[ 2984.408421] Buffer I/O error on device sdb, logical block 247999

What?? Are you going crazy with some SD CARDS?

Cannot you mount them an dmesg shows you something like previous logfile?

Don’t worry man, the soution is very simple:

reboot your eeepc, press F2 to enter BIOS and set the Variable: “OS Installation” to: [Finished].

That’s all, all of your sd cards will begin to work without any problems!

see you!

Yes you can,

It’s not only a great political slogan..

Does Heavy Disk I/O harm your system responsiveness? (Do Firefox and other apps become unresponsive when using I/O on SSD?)

There is a “little” workaround: change your I/O Scheduler!

You can change I/O Scheduler of your kernel on eeepc 900 (and not only, also on: 901, dell mininote and the other netbooks with Solid State Disk) and use someone that will takes you some advantages,

with the option: “elevator” you can try many different schedulers from you kernel:

Completely Fair Queuing (Linux) (Default one)

Anticipatory scheduling

Noop scheduler

Deadline scheduler

Also as you can read by the description of each scheduler, noop seems to be the best I/O Scheduler for Systems placed on SSD,

but I’ve experienced more improvement using Deadline Scheduler.

this is an example showing my current Grub configuration:

title        Ubuntu 8.10, kernel 2.6.27-8-eeepc
uuid        32399df8-340e-45bb-8344-430976ffa718
kernel        /boot/vmlinuz-2.6.27-8-eeepc root=UUID=32399df8-340e-45bb-8344-430976ffa718 ro elevator=deadline
initrd        /boot/initrd.img-2.6.27-8-eeepc
quiet

Please note: what you are experiencing on your system seems to be a bug related to the kernel,

Stay Tuned on: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/131094 to have more updates!

gbyte :-)