USB HD fails to detect on second connection


We have some EXT3 formatted external USB 250GB drives that we use for transfering templates between our site and our customer sites.

When I plug in the device after a reboot of ESX 3.0.1 dmesg reveals the device and I can mount it, however if I remove the device then plug it in again, dmesg only shows:

USB Mass Storage device found at 4

input0: USB HID v1.11 Device \[Western Digital External HDD] on usb5:4.1

qla2x00_set_info starts at address = d2551060

usb.c: USB disconnect on device 00:1d.7-4 address 4

qla2x00_set_info starts at address = d2551060

qla2x00_set_info starts at address = d2551060

hub.c: new USB device 00:1d.7-4, assigned address 5

WARNING: USB Mass Storage data integrity not assured

and doesn't give me a device to mount.

If I mount against the old device, and do an fdisk, the following is displayed:

\[root@tsvresx02 mnt]# fdisk /dev/sde1

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel

Building a new DOS disklabel. Changes will remain in memory only,

until you decide to write them. After that, of course, the previous

content won't be recoverable.

The number of cylinders for this disk is set to 17848.

There is nothing wrong with that, but this is larger than 1024,

and could in certain setups cause problems with:

1) software that runs at boot time (e.g., old versions of LILO)

2) booting and partitioning software from other OSs


Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

followed by an 'l'

Disk /dev/sde1: 146.8 GB, 146812957184 bytes

255 heads, 63 sectors/track, 17848 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

If I reboot the server, then no problem, but we can't keep rebooting these servers.

If anyone has any ideas what may be causing this or a possible solution like how to stop and start the USB damon, I'd be very grateful.

Server: 2x Proliant DL580 (clustered) with HP MSA1500 SAN. The USB disk is a Western Digital 'My Book'.

Thank you kindly.


0 Kudos
1 Reply

P.S. In danger of getting my knuckles rapped here for the comparision but one of our Fed Core 4 boxes can see the contents of the disk and everything looks fine.

0 Kudos