Get a powered USB hub (i.e. a usb hub which also connects to a wall power socket). I'm not familiar with RPi USB version but check for USB 3.0 vs. 2.0.
On 15 December 2014 at 06:07, Gabor Szabo <ga...@szabgab.com> wrote: > > 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 >>> >>> >>> > > _______________________________________________ > Linux-il mailing list > Linux-il@cs.huji.ac.il > http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il > > -- <http://au.linkedin.com/in/gliderflyer>
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