RE: [PATCH 1/2] scsi: TUR path is down after adapter gets reset in multipath configuration(scsi_error.c)

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> -----Original Message-----
> From: linux-scsi-owner@xxxxxxxxxxxxxxx [mailto:linux-scsi-
> owner@xxxxxxxxxxxxxxx] On Behalf Of wenxiong@xxxxxxxxxxxxxxxxxx
> Sent: Monday, 27 October, 2014 1:02 PM
> To: James.Bottomley@xxxxxxxxxxxxxxxxxxxxx
> Cc: hch@xxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx;
> brking@xxxxxxxxxxxxxxxxxx
> Subject: [PATCH 1/2] scsi: TUR path is down after adapter gets reset
> in multipath configuration(scsi_error.c)
> 
> After an ipr adapter gets reset, all disk array devices require a
> start unit command to be issued to them before they will accept
> commands. So, with the SCSI EH change, we now end up in a scenario 
> with dual ipr adapters where the TUR getting issued from the health
> checker returns with a Not Ready response and since SCSI EH no
> longer triggers the Start Unit in this scenario, the path never
> recovers.
> 

This description doesn't make sense without reading the thread:
[dm-devel] [PATCH 1/1] multipath-tools: Change path checker for IBM IPR devices

Example: what is "the SCSI EH change"?

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