From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: Backplane mystery Date: Thu, 26 Feb 2009 10:34:27 -0500 Message-ID: <49A6B683.9060806@rtr.ca> References: <49A6B441.8010605@seiner.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from rtr.ca ([76.10.145.34]:36155 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755092AbZBZPeb (ORCPT ); Thu, 26 Feb 2009 10:34:31 -0500 In-Reply-To: <49A6B441.8010605@seiner.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Yan Seiner Cc: linux-ide@vger.kernel.org Yan Seiner wrote: > I have an external enclosure with an SATA backplane with 20 drive > slots. I am using 4 port multipliers to drive all 20 slots. > > One set of 5 slots connected to a single port multiplier always fails with > > [ 16.449673] ata2: FORCE: PHY spd limit set to 1.5Gbps > [ 16.449740] ata2: SATA max UDMA/100 host m128@0xfdeff000 port > 0xfdefa000 irq 16 > [ 20.616038] ata2: SATA link down (SStatus 0 SControl 10) > [ 80.596644] ata2: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xe > frozen > [ 80.596956] ata2: irq_stat 0x00a00080, device exchanged > [ 80.597039] ata2: hard resetting link > [ 90.604024] ata2: softreset failed (timeout) > [ 90.604108] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 10) > [ 90.604183] ata2: link online but device misclassified, retrying > [ 90.604264] ata2: hard resetting link > [ 100.604026] ata2: softreset failed (timeout) > [ 100.604109] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 10) > [ 100.604186] ata2: link online but device misclassified, retrying > [ 100.604259] ata2: hard resetting link > [ 135.612026] ata2: softreset failed (timeout) > [ 135.612109] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 10) > [ 135.612191] ata2: link online but device misclassified, retrying > [ 135.612273] ata2: hard resetting link > [ 140.616024] ata2: softreset failed (timeout) > [ 140.616107] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 10) > [ 140.616183] ata2: link online but device misclassified, device > detection might fail > [ 140.616296] ata2: EH complete > > I've swapped cables, port multipliers, and so on. It's not the > backplace, as I can swap cables from one of the port multipliers that > works and it will detect drives. It's not the port multiplier, as I've > swapped those. The only thing I can think of is that it's failing > initialization. If I swap cables from a port multiplier that's > initialized while the system is running, it works. > > Before I start taking random actions, can someone interpret the above > for me? What's it telling me? > > For comparison, here's the initialization sequence from the adjacent > port multiplier: > > [ 16.449504] ata1: FORCE: PHY spd limit set to 1.5Gbps > [ 16.449571] ata1: SATA max UDMA/100 host m128@0xfdeff000 port > 0xfdef8000 irq 16 > [ 18.536033] ata1: SATA link down (SStatus 0 SControl 10) > [ 19.374191] ata10: SATA max UDMA/133 cmd 0xbc00 ctl 0xb800 bmdma > 0xb408 irq 21 > [ 80.596647] ata1: exception Emask 0x10 SAct 0x0 SErr 0x0 action 0xe > frozen > [ 80.596649] ata1: irq_stat 0x00a00080, device exchanged > [ 80.596653] ata1: hard resetting link > [ 82.796045] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 10) > [ 82.796408] ata1.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, > feat 0x1/0x9 > [ 82.796796] ata1.00: hard resetting link > [ 83.116406] ata1.00: SATA link down (SStatus 0 SControl 10) > [ 83.116482] ata1.01: hard resetting link > [ 83.436402] ata1.01: SATA link down (SStatus 0 SControl 310) > [ 83.436479] ata1.02: hard resetting link > [ 83.756394] ata1.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300) > [ 83.756467] ata1.03: hard resetting link > [ 84.076432] ata1.03: SATA link down (SStatus 0 SControl 310) > [ 84.076510] ata1.04: hard resetting link > [ 84.396387] ata1.04: SATA link down (SStatus 0 SControl 310) > [ 84.396465] ata1.05: hard resetting link > [ 84.716330] ata1.05: SATA link up 1.5 Gbps (SStatus 113 SControl 310) > [ 84.828010] ata1.02: failed to IDENTIFY (I/O error, err_mask=0x11) > [ 84.828082] ata1.15: hard resetting link > [ 84.828145] ata1: controller in dubious state, performing PORT_RST > [ 87.060032] ata1.15: SATA link up 1.5 Gbps (SStatus 113 SControl 10) > [ 87.060351] ata1.00: hard resetting link > [ 87.380330] ata1.00: SATA link down (SStatus 0 SControl 10) > [ 87.380404] ata1.01: hard resetting link > [ 87.700329] ata1.01: SATA link down (SStatus 0 SControl 310) > [ 88.756028] ata1.02: hard resetting link > [ 89.076366] ata1.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300) > [ 89.716017] ata1.05: hard resetting link > [ 90.036392] ata1.05: SATA link up 1.5 Gbps (SStatus 113 SControl 310) > [ 90.148021] ata1.02: failed to IDENTIFY (I/O error, err_mask=0x11) > [ 90.148104] ata1.15: hard resetting link > [ 90.148177] ata1: controller in dubious state, performing PORT_RST > [ 92.380043] ata1.15: SATA link up 1.5 Gbps (SStatus 113 SControl 10) > [ 92.380415] ata1.00: hard resetting link > [ 92.700329] ata1.00: SATA link down (SStatus 0 SControl 10) > [ 92.700398] ata1.01: hard resetting link > [ 93.020334] ata1.01: SATA link down (SStatus 0 SControl 310) > [ 94.076081] ata1.02: hard resetting link > [ 94.396398] ata1.02: SATA link up 3.0 Gbps (SStatus 123 SControl 300) > [ 94.396479] ata1.03: hard resetting link > [ 94.716392] ata1.03: SATA link down (SStatus 0 SControl 310) > [ 94.716465] ata1.04: hard resetting link > [ 95.036397] ata1.04: SATA link down (SStatus 0 SControl 310) > [ 95.036474] ata1.05: hard resetting link > [ 95.356426] ata1.05: SATA link up 1.5 Gbps (SStatus 113 SControl 310) > [ 95.369116] ata1.02: ATA-8: Hitachi HDT721010SLA360, ST6OA31B, max > UDMA/133 > [ 95.369193] ata1.02: 1953525168 sectors, multi 0: LBA48 NCQ (depth > 31/32) > [ 95.370256] ata1.02: configured for UDMA/100 > [ 95.370769] ata1: EH complete > > If I swap cables from ata1 to ata2 while the system is running, the > backplane will detect drives and work fine. > > I'm already forcing a slower speed: > > yan@selene:/etc/modprobe.d$ cat libata > options libata force=1.15:1.5Gbps,2.15:1.5Gbps,3.15:1.5Gbps,4.15:1.5Gbps > > I'm using a Sil 3132 controller: > > 02:00.0 Mass storage controller: Silicon Image, Inc. SiI 3132 Serial ATA > Raid II Controller (rev 01) > > The system sees 3 port multipliers; not 4 as it should: > > [ 82.488354] ata4.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, > feat 0x1/0x9 > [ 82.488507] ata3.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, > feat 0x1/0x9 > [ 82.796408] ata1.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, > feat 0x1/0x9 > > I suspect it's cabling length as the 5 "dead" slots are the farthest > down the backplane but swapping cables randomly just doesn't seem like a > good approach. > > What's my next step? .. Perhaps try a different chipset controller card, in hope that it will have stronger drive capability?