shellscript conditional to check for external disk

[Wojciech Puchar]

>
> Jun 22 11:44:49 Christi kernel: umass0: <SanDisk Corporation Cruzer Mini, class
> 0/0, rev 2.00/0.10, addr 2> on uhub4
> Jun 22 11:44:49 Christi root: Unknown USB device: vendor 0x0781 product 0x5150 b
> us uhub4
> Jun 22 11:44:49 Christi kernel: da0 at umass-sim0 bus 0 target 0 lun 0
> Jun 22 11:44:49 Christi kernel: da0: <SanDisk Cruzer Mini 0.1> Removable Direct
> Access SCSI-2 device
> Jun 22 11:44:49 Christi kernel: da0: 40.000MB/s transfers
> Jun 22 11:44:49 Christi kernel: da0: 122MB (250879 512 byte sectors: 64H 32S/T 1
> 22C)
> Jun 22 11:44:49 Christi kernel: GEOM_LABEL: Label for provider da0s1 is msdosfs/
> .
> Jun 22 11:44:56 Christi kernel: umass0: at uhub4 port 2 (addr 2) disconnected
> Jun 22 11:44:56 Christi kernel: (da0:umass-sim0:0:0:0): lost device
> Jun 22 11:44:56 Christi kernel: (da0:umass-sim0:0:0:0): removing device entry
> Jun 22 11:44:56 Christi kernel: GEOM_LABEL: Label msdosfs/  removed.
> Jun 22 11:44:56 Christi kernel: umass0: detached
>
man devd
man devd.conf