From: Mark Lord <liml@rtr.ca>
To: Tejun Heo <htejun@gmail.com>, Jeff Garzik <jgarzik@pobox.com>,
Alan Cox <alan@redhat.com>,
IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Port Multiplier drives not always all found on cold plug
Date: Fri, 16 May 2008 12:34:39 -0400 [thread overview]
Message-ID: <482DB79F.2030204@rtr.ca> (raw)
Tejun,
Since enabling PMP support in sata_mv, there have been some recent
reports of not all drives being found on a PM.
I can reproduce this here myself, too:
(1) silicon image PM with four drives attached.
(2) power-down the PM.
(3) rmmod sata_mv ; modprobe sata_mv (latest upstream).
(4) plug (power off) PM into sata_mv card (7042 chipset).
(5) power on the PM.
(6) watch only 2-3 of the four drives get found.
If the PM was already powered on in advance, then all drives are found.
sata_mv relies entirely on libata-*.c for PMP resets/enumerations,
so I'm not sure that the problem is in sata_mv.
Any ideas?
next reply other threads:[~2008-05-16 16:34 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-16 16:34 Mark Lord [this message]
2008-05-16 16:46 ` Port Multiplier drives not always all found on cold plug Mark Lord
2008-05-16 16:54 ` Mark Lord
2008-05-16 17:27 ` Mark Lord
2008-05-16 18:06 ` Mark Lord
2008-05-17 14:21 ` Tejun Heo
2008-05-17 17:32 ` Mark Lord
2008-05-17 17:52 ` Tejun Heo
2008-05-17 19:16 ` Mark Lord
2008-05-18 5:23 ` Tejun Heo
2008-06-02 3:38 ` JR Wilbert
2008-06-09 1:47 ` Tejun Heo
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