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I have server in OVH with newest Ubuntu 12.10, but where are block devices of whole disk?

root@ns:~# df -h
Filesystem      Size  Used Avail Use% Mounted on
rootfs          222G  2.4G  208G   2% /
/dev/root       222G  2.4G  208G   2% /
none            3.2G  252K  3.2G   1% /run
none            5.0M     0  5.0M   0% /run/lock
none             16G     0   16G   0% /run/shm
none            100M     0  100M   0% /run/user
/dev/md1        495M   25M  445M   6% /boot
root@ns:~# fdisk /dev/sd
sda1  sda2  sda3  sdb1  sdb2  sdb3  
root@ns:~# fdisk /dev/sda
fdisk: unable to open /dev/sda: No such file or directory

On the same server with Ubuntu 12.04 I have normal /dev/sda and sdb device.

Best Regards,

Konrad Dudek

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You should open a ticket at OVH.

As a workaround:

  • mknod /dev/sda b 8 0
  • mknod /dev/sdb b 8 16
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sudo fdisk -l

That should show all of the block devices that fdisk knows about.

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link Of course it shows only my RAID devices, but I want to know where are disk devices of RAID (not only sda1, sdb1 etc.) – Konrad Dudek Dec 6 '12 at 11:36
I think the OP s interested in accessing it raw. – hexafraction Dec 6 '12 at 11:36
update-grub2 doesn't work correctly too. – Konrad Dudek Dec 6 '12 at 12:02
maybe: 1) run lscpi to find RAID model 2) Find out what command needs to be run (depending on RAID model) to get the model number or serial numbers of hdd's. 3) run hdparm -i /dev/$device, to figure out which device is which. <--- Thats a long-shot, but might be worth a try. – MCR Dec 6 '12 at 12:36

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