[dm-devel] Testing dm-integrity (WAS: Re: Support for data CRC)

[Mikulas Patocka]

On Mon, 11 Sep 2017, Sebastian Andrzej Siewior wrote:

> On 2017-09-10 22:06:13 [+0200], Milan Broz wrote:
> > There is integritysetup tool (part of cryptsetup package) that automates format and mount of dm-integrity devices.
> > For now in devel git, I expect we will do some release package this month.
> > (So no need to use dmsetup here.)
> ah, good, thank. I read the documentation and it mentioned just those
> steps not a pointer to tool.
> 
> > > at some point I expected dm-integrity to check the other disk in RAID.

If you need to check the other disk in case of error, you need to put 
dm-integrity below the RAID driver - i.e. create two dm-integrity targets 
on two physical disks and put the RAID target above them.

Mikulas

> > The dm-integrity has no connection to RAID, it will just return EILSEQ (instead of EIO error)
> > to inform that the error is an data integrity error, not a media (or other) IO error.
> 
> okay. Now I have a pointer where to look next.
> 
> > Milan
> 
> Sebastian
>