Hi all,
Could you please provide me some inputs on below issues?
--Srini.
________________________________________
From: Srinivas Naga Venkatasatya Pasagadugula
Sent: Friday, November 20, 2009 6:44 PM
To: linux-scsi@xxxxxxxxxxxxxxx
Cc: James Bottomley; jasonchu@xxxxxxxxxxx; ayan@xxxxxxxxxxx; kewei@xxxxxxxxxxx; tom_peng@xxxxxxxxx; aoqingyun@xxxxxxxxx; jack_wang@xxxxxxxxx; 'tom_peng@xxxxxxxxx'
Subject: LIBSAS/MVSAS: Issues with hot-plug Out/In of disks from cascading expanders while IO is going on
Hi,
I have some issues with hot-plug Out/In of disks from cascading expanders while IO is going on.
I'm using Adaptec ASC-1045/1405 which uses the Marvell 88SE6440 chip.
Test Set Up;
--------------
Cascading of edge expanders.
Diskstress IO test tool.
Description:
-----------------
1. For SATA: After freeing the slot info in mvs_abort_task ( ) function (same as in mvsas driver latest patch), its working as expected.
2. For SAS drives, still problem exists with hot-plugging of disks in expander while IO is going on.
Need Clarification:
----------------------
1. After hot plug out of disks from expanders, why we need to wait for timeout to happen then calling abort_task TMF to freeing the device info?
2. Once the broad cast signal is received why don't we freeing the entire device resources instead of waiting for timeout to happen?
- Because it is taking long time to come out from IO Application and
from fdisk -l.
3. In case of SAS why we are sending abort TMF to target which is already disconnected?
(Note: Assumed there is no IT-Nexus support for both SAS and SATA)
Any inputs are highly appreciated.
Thanks
Srini
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