Hmm, good question. The Raspberry does see the device when it is connected, so is it possible that it needs more power after later on?
How can I check? If the problem is lack of current, how can I solve that? Can I put one of these usb hubs that also provide power between the two? Gabor On Sun, Dec 14, 2014 at 8:43 PM, E.S. Rosenberg <esr+linux...@g.jct.ac.il> wrote: > > Are you providing the external HDD with sufficient electricity? The > Raspberry is most likely not capable of providing enough current... > > 2014-12-14 19:30 GMT+02:00 Gabor Szabo <ga...@szabgab.com>: > >> So finally I install the Raspberry Pi I bought a few weeks ago and wanted >> to add an external HDD. >> I plugged in the external hard drive and /var/log/syslog printed the >> following: >> >> >> Dec 14 17:02:55 pi kernel: [ 759.981949] usb 1-1.3: new high-speed USB >> device number 8 using dwc_otg >> >> Dec 14 17:02:55 pi kernel: [ 760.163364] usb 1-1.3: New USB device >> found, idVendor=1058, idProduct=0820 >> >> Dec 14 17:02:55 pi kernel: [ 760.163398] usb 1-1.3: New USB device >> strings: Mfr=1, Product=2, SerialNumber=5 >> >> Dec 14 17:02:55 pi kernel: [ 760.163414] usb 1-1.3: Product: My Passport >> 0820 >> >> Dec 14 17:02:55 pi kernel: [ 760.163429] usb 1-1.3: Manufacturer: >> Western Digital >> >> Dec 14 17:02:55 pi kernel: [ 760.163444] usb 1-1.3: SerialNumber: >> 57583431413432454363833 >> >> Dec 14 17:02:55 pi kernel: [ 760.169522] usb-storage 1-1.3:1.0: USB Mass >> Storage device detected >> >> Dec 14 17:02:55 pi kernel: [ 760.181935] scsi0 : usb-storage 1-1.3:1.0 >> >> Dec 14 17:02:56 pi kernel: [ 761.183065] scsi 0:0:0:0: Direct-Access >> WD My Passport 0820 1012 PQ: 0 ANSI: 6 >> >> Dec 14 17:02:56 pi kernel: [ 761.187365] scsi 0:0:0:1: Enclosure >> WD SES Device 1012 PQ: 0 ANSI: 6 >> >> Dec 14 17:02:56 pi kernel: [ 761.189473] sd 0:0:0:0: [sda] Spinning up >> disk... >> >> Dec 14 17:02:56 pi kernel: [ 761.277106] sd 0:0:0:0: Attached scsi >> generic sg0 type 0 >> >> Dec 14 17:02:56 pi kernel: [ 761.278094] scsi 0:0:0:1: Attached scsi >> generic sg1 type 13 >> >> >> But then when I try to run >> >> >> $ sudo fdisk /dev/sda >> >> I get >> >> fdisk: unable to open /dev/sda: No such device or address >> >> $ ls -l /dev/sda >> >> brw-rw---T 1 root floppy 8, 0 Dec 14 17:21 /dev/sda >> >> $ sudo fdisk -l >> >> only lists the sdcard >> >> >> The external disk is brand new and it has NTFS on it. I have not handled >> disk in linux for a long time, but a I recall I am supposed to use fdisk to >> partition it and then use mkfs.ext4 to format. >> >> >> So what am I missing here? >> >> >> Gabor >> >> >>
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