From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugme-daemon@bugzilla.kernel.org
Subject: [Bug 12163] mptsas driver cannot discover some hotplugged SATA/SAS disks
Date: Wed, 17 Dec 2008 20:31:24 -0800 (PST)
Message-ID: <20081218043124.3F698108041@picon.linux-foundation.org>
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http://bugzilla.kernel.org/show_bug.cgi?id=12163
crquan@gmail.com changed:
What |Removed |Added
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CC| |crquan@gmail.com
------- Comment #5 from crquan@gmail.com 2008-12-17 20:31 -------
This driver worked well in general situation,
1. use mptsas vendor driver 4.00.43 and this patch to let it work on 2.6.26.2;
2. all disks can be recognized when staticly booting or after hotplugged;
But today we found another severe hotplug problem:
Steps to reproduce:
1. use mdadm to create a soft RAID, e.g. create a md1 with level 5 on
sdm,sdn,sdo;
2. if plug the disks in a soft RAID, the disks(sdm,sdn,sdo) cannot be
recognized after inserted;
3. if these disks inserted into other slots, they can be recognized by mptsas;
4. if other disks inserted into these slots where (sdm,sdn,sdo) occupied, they
cannot be recognized, too.
5. At the same time, other disks not in the soft RAID still support hotplug
well;
To sum in one word, the slot which has been occupied by a disk in soft RAID
cannot support hotplug anymore (before rebooting).
I suspect this is a generic scsi-level problem, sometimes it reports
scsi_target alloc failed with -EEXIST;
Reproducible: always
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