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Groups > linux.debian.user > #177343

Re: disk error -> reset entire USB connection

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On Thu, Feb 02, 2017 at 06:00:59PM -0800, Ross Boylan wrote:
> I have multiple drives in a Vantec HX4 case connect by USB 3.0  It
> seems a disk I/O error* causes the entire USB connection to reset,
> causing all the drives to be remapped and screwing up the connections
> to all the disks in the case.
> 
> Is this expected behavior for the linux kernel?
> 

I have a drive cage with 4 RAIDed disks in it (two pairs of RAID1) 
connected with USB and I don't see any issues. I am running Jessie and I 
keep my machine up to date (for Jessie, that is :) ).

One thought -- how are you identifying the disks for mounting? If you 
identify them in fstab by UUID, it shouldn't matter if they get remapped 
when the USB infrastructure resets, no?

I see my 4 disks in my drive cage (from the days when they were not 
RAID, admittedly) sometimes come up as Drive 1 = /dev/sdc, Drive 2 = 
/dev/sdd, Drive 3 = /dev/sde, Drive 4 /dev/sdf, but at other times they 
have been Disk 1 = /dev/sde, Disk 2 = /dev/sdf, Disk 3 = /dev/sdc, Disk 
4 = /dev/sdd, and my machine was none the worse for it.

Mark

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Thread

disk error -> reset entire USB connection Ross Boylan <rossboylan@stanfordalumni.org> - 2017-02-03 03:10 +0100
  Re: disk error -> reset entire USB connection deloptes <deloptes@gmail.com> - 2017-02-03 10:30 +0100
  Re: disk error -> reset entire USB connection Mark Fletcher <mark27q1@gmail.com> - 2017-02-03 16:00 +0100
    Re: disk error -> reset entire USB connection Ross Boylan <rossboylan@stanfordalumni.org> - 2017-02-03 22:20 +0100

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