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Old 09-17-2008, 12:33 PM   #1
jkaidor
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Registered: Jun 2008
Location: SF Peninsula
Distribution: slackware
Posts: 33

Rep: Reputation: 23
Doesn't recognize external USB drive


Hello,

I have a Dell 8400 with a fresh Slackware 12.1 install.
I plugged in an external USB 320gig drive of unknown provenance installed in a "Nexstar 2" case. ( Unknown
because I don't remember the make/model of the drive, and I don't feel like taking the case apart ). It used to work in my old Slackware 10 system...

The drive is recognized by the EHCI driver, but is not assigned to an actual device.
------- snip from /var/log/messages -----------
Sep 17 09:10:00 tr4 kernel: usb 1-4: new high speed USB device using ehci_hcd and address 4
Sep 17 09:10:00 tr4 kernel: usb 1-4: configuration #1 chosen from 1 choice
------- endsnip --------------------------------

That's all I see in the messages WRT this device. Nothing about it being assigned to any usable drive.
And no error message, either.

Only /dev/sda and /dev/sdb exist, and those are the internal SATA drives.

So, where to start looking? What subsystem is supposed to make this USB device into a real disk drive?

Thanks


- Jerry Kaidor
 
Old 09-17-2008, 01:11 PM   #2
harryhaller
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Registered: Sep 2004
Distribution: Slackware-14.2
Posts: 468

Rep: Reputation: Disabled
You should see some scsi messages afterwards:

Quote:
usb 1-4: new high speed USB device using ehci_hcd and address 3
usb 1-4: configuration #1 chosen from 1 choice
scsi3 : SCSI emulation for USB Mass Storage devices
scsi 3:0:0:0: Direct-Access WD 10EACS External 1.05 PQ: 0 ANSI: 4
sd 3:0:0:0: [sda] 1953525168 512-byte hardware sectors (1000205 MB)
sd 3:0:0:0: [sda] Write Protect is off
sd 3:0:0:0: [sda] 1953525168 512-byte hardware sectors (1000205 MB)
sd 3:0:0:0: [sda] Write Protect is off
sda: sda1 sda2 < sda5 sda6 sda7 sda8 sda9 sda10 sda11 sda12 sda13 sda14 >
sd 3:0:0:0: [sda] Attached SCSI disk
sd 3:0:0:0: Attached scsi generic sg0 type 0
Do you have anything like that in /var/log/messages?
 
Old 09-17-2008, 07:07 PM   #3
jkaidor
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Registered: Jun 2008
Location: SF Peninsula
Distribution: slackware
Posts: 33

Original Poster
Rep: Reputation: 23
Problem solved. USB block devices support was not compiled into the kernel.
Oops.

- Jerry Kaidor
 
  


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