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Manually Mount External USB Drive

Hi,

I hope this is the right place for this question.... sorry if not!

I have a NAS running Linux which is having some problems and I'm trying to save my data before doing a factory-restore.

I can log in using telnet and have managed to mount the internal drive (which contains the data I want to save). I want to use an external USB drive to save the data on. I've plugged the drive in, but can't work out how to get the system to recognise it.

dmesg gives:

[snip] ehci_platform ehci_platform.4523: EHCI Host Controller ehci_platform ehci_platform.4523: new USB bus registered, assigned bus number 1 ehci_platform ehci_platform.4523: irq 17, io mem 0x00000000 ehci_platform ehci_platform.4523: park 0 ehci_platform ehci_platform.4523: USB 0.0 initialized, EHCI 1.00, driver 10 Dec 2004 hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected ehci_platform ehci_platform.16781: EHCI Host Controller ehci_platform ehci_platform.16781: new USB bus registered, assigned bus number 2 ehci_platform ehci_platform.16781: irq 12, io mem 0x00000000 ehci_platform ehci_platform.16781: park 0 ehci_platform ehci_platform.16781: USB 0.0 initialized, EHCI 1.00, driver 10 Dec 2004 hub 2-0:1.0: USB hub found hub 2-0:1.0: 1 port detected ohci_hcd: 2004 Nov 08 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI) USB Universal Host Controller Interface driver v2.2 usb 2-1: new high speed USB device using ehci_platform and address 2 hub 2-1:1.0: USB hub found hub 2-1:1.0: 4 ports detected qh_schedule: frame=255, uframe=0, cmask=0x0, smask=0x1, period=256, u_period=2048 usbcore: registered new driver usblp drivers/usb/class/usblp.c: v0.13: USB Printer Device Class driver usbcore: registered new driver hiddev usbcore: registered new driver usbhid drivers/usb/input/hid-core.c: v2.01:USB HID core driver mice: PS/2 mouse device common for all mice [snip]

usb 2-1.3: new high speed USB device using ehci_platform and address 3 usb 2-1.3: USB disconnect, address 3 usb 2-1.3: new high speed USB device using ehci_platform and address 4 usb 2-1.3: USB disconnect, address 4 usb 2-1.3: new high speed USB device using ehci_platform and address 5

What next? My googling seems to suggest I should expect more output than just the single "new high speed" lines. (As you can see I turned the external drive on and off a couple of times). Any help gratefully received!

Thanks, Adam

--
Adam Richardson
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Reply to
Adam
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recognise it.

1) see if the USB device is being accepted. Try lsusb and cat /proc/bus/usb/devices before and after attaching the USB device to see the changes (that way you know to ignore the hubs and other USB devices). 2) On Fedora Linux, dmesg shows this for a USB flash drive scsi 2:0:0:0: Direct-Access USB Flash Memory 1.04 PQ: 0 ANSI: 0 CCS sd 2:0:0:0: [sdb] 2007040 512-byte hardware sectors (1028 MB) sd 2:0:0:0: [sdb] Write Protect is off sd 2:0:0:0: [sdb] Mode Sense: 23 00 00 00 sd 2:0:0:0: [sdb] Assuming drive cache: write through sdb: sdb1 sd 2:0:0:0: [sdb] Attached SCSI removable disk sd 2:0:0:0: Attached scsi generic sg2 type 0

The drive is now /dev/sdb and /dev/sdb1. "fdisk -l /dev/sdb" shows the partition table, /dev/sdb1 is the partition with the file system that you mount.

If the drive is not set to auto-spinup or spins itself down (such as Seagate Freeagent) then Linux will be /very unhappy/.

Reply to
Jeff Jonas

recognise it.

"command not found"

OK, that produces a new entry:

T: Bus=02 Lev=02 Prnt=02 Port=02 Cnt=01 Dev#= 7 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=13fd ProdID=0540 Rev= 2.37 S: Manufacturer=Initio S: Product=ST3802110A S: SerialNumber=00101005400001AA0 C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 2mA I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=(none) E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=125us

How do I make use of this info?

CCS

Unfortunately dmesg here doesn't reveal much of any use.

This should be fine. I can hear the drive spin up when I turn it on and I've never been able to get it to spin down when I've tried!

Thanks a lot for the help, Adam

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Adam Richardson
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Reply to
Adam

Let's see

1) Product=ST3802110A means the adapter is properly passing back information that you have a Seagate Barracuda 7200.9 ST3802110A 80GB Hard Drive

2) I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=(none)

The "Driver=none" means your USB system is not recognizing the adapter so it's not being assigned to any driver. Nothing's happening until that's fixed.

Perhaps there's a clue here:

formatting link

Reply to
Jeff Jonas

also try dmesg and see what is being printed there also check /proc/scsi/scsi. The drive will get a letter based on it's position in that list -- /dev/sdd would be the device for the fourth entry, /dev/sdd1 would be the first partition.

Try 'fdisk -l /dev/sdd' (or whatever device it is) to get the list of partitions,

Then mkdir a directory to mount it such as /mnt/removable, and mount it with 'mount /dev/sdd1 /mnt/removable' you may need '-t vfat' or '-t msdos' to indicate the file system type.

Reply to
AZ Nomad

If there is, I'm afraid it's missed me.

dmesg doesn't give much info (see my first post).

Thanks, I've done all that but it doesn't show up anywhere. /proc/scsi/scsi only shows the internal drive. I've played around with "fdisk -l" and tried "fdisk -l xxx" for basically every entry in /dev to try and find it with trial and error, but no joy. I guess that's not surprising if, as Jeff says, the drive is not being recognized by the USB system. I've no idea how to make that work though. :(

Thanks, Adam

--
Adam Richardson
Carpe Diem
Reply to
Adam

Do you have a matching usb_storage module? What does lsmod tell you? The drive is detected by the USB sub system but to me it looks like the appropriate module (usb_storage) isn't loaded.

b.r.,

Marc

Reply to
Marc Schlensog

lsmod gives no output (and /proc/modules is empty).

Sounds sensible. After a bit of googling, I discovered a "usb-storage.ko" file in /lib/modules. I then did an "insmod" on it and my USB drive showed up with "fdisk -l" :D

I've now got it mounted happily and am in the process of backing up my files as I type :)

Thanks a lot for the help, Adam

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Adam Richardson
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Reply to
Adam

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