grub---problem

Nils Kassube kassube at gmx.net
Wed Dec 2 11:18:50 UTC 2015


Ralf Mardorf wrote:
> You do not get
>   fdisk: cannot open /dev/sda: No such file or directory
> and at the same time the output of parted -l shows sdb only and not
> sda? That's just a rhetorical question. Please, next time post
> everything.
> 
> I don't know, why there is no device sda, why the first device is sdb.

I could think of two possibilities:

1. Both drives are USB devices and sda is unplugged after some time.

2. There is only sda, connected via USB. After a partition from sda is 
mounted, the drive is replugged (*) and it becomes sdb because sda is 
still in use (even though it is gone). This situation would also be 
consistent with a previous mail where sda1 could be mounted but later 
there was no device sda.

(*) This might happen unintentionally due to a short power dropout of a 
bad power supply.


Nils




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