Originally Posted by notageek
You can expect some performance issue, I don't think is as fast as a hard drive. Can you please post "df -hT" of the live system.
I'm interested in knowing the root device, is it /dev/sdX or /dev/ubX? Also can you run "hdparm -tT /dev/XXX" and report back.
/dev/sdb1 ext3 14G 3.0G 11G 23% /
tmpfs tmpfs 1001M 604K 1001M 1% /dev/shm
/dev/sr0 iso9660 4.1G 4.1G 0 100% /media/"FU 20090210 10 x86_64 DVD"
As you can see, the root partition is mounted over /dev/sdb1.
Here is hdparm -tT /dev/sdb1 output:
Timing cached reads: 2236 MB in 2.00 seconds = 1118.09 MB/sec
Timing buffered disk reads: 74 MB in 3.08 seconds = 24.04 MB/sec
that you compare with the hard disk performance:
hdparm -tT /dev/sda2
Timing cached reads: 2090 MB in 2.00 seconds = 1044.92 MB/sec
Timing buffered disk reads: 226 MB in 3.03 seconds = 74.69 MB/sec
I am aware that an USB pen will not present same performances as an hard disk, but my problem is due to the frequent freezing of the system (hint: when this happens, the pdflush process is in D state).
Perhaps should I tune my ext3 filesystem with noatime option ?