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Usb device is not always being recognised

Asked by Alfredborg

My usb portable harddisk is not always being recognized, sometimes I have to reboot to get it detected, and I also have this problem on my pen drive. Any patch to fix this problem? Thanks

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Davedave (cottrill-david) said : 		#1

You'd have to give more information.
Can you put your drive in and post the output of 'lsusb'?
Also please tell us the output of 'uname -r' and 'dmesg | tail'

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Alfredborg (alfredborg) said : 		#2

i did the lsusb and it detected it automatically. The output of the lsusb is:
alfred@alfred-desktop:~$ lsusb
Bus 006 Device 001: ID 0000:0000
Bus 005 Device 001: ID 0000:0000
Bus 004 Device 002: ID 0409:005a NEC Corp.
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000

output of uname -r is:
2.6.24-22-generic

output of dmesg tail is:
alfred@alfred-desktop:~$ dmesg | tail
[ 258.289196] sd 2:0:0:0: [sdb] Write Protect is off
[ 258.289207] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ 258.289211] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 258.291421] sd 2:0:0:0: [sdb] 20044080 512-byte hardware sectors (10263 MB)
[ 258.293192] sd 2:0:0:0: [sdb] Write Protect is off
[ 258.293203] sd 2:0:0:0: [sdb] Mode Sense: 03 00 00 00
[ 258.293208] sd 2:0:0:0: [sdb] Assuming drive cache: write through
[ 258.293223] sdb: sdb1
[ 258.301136] sd 2:0:0:0: [sdb] Attached SCSI disk
[ 258.301221] sd 2:0:0:0: Attached scsi generic sg3 type 0

I hope this info is useful. Sorry, but I'm new to linux and know nothing about it. I've just changed a few months ago from windows to ubuntu.

Thanks

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Manish Kutaula (manish-yo) said : 		#3

its showing that ur USB drive is connected. write the output of fdisk -l after connecting usb drive.

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