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[Launchpad Bug Tracker <986321@xxxxxxxxxxxxxxxxxx>]

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We have a setup of
1- 3 Sata PCI cards (Syba PCI Express SATA II 4-Port RAID Controller Card SY-PEX40008) 2- connected to 9 backplanes (CFI-B53PM 5 Port Backplane (SiI3726)).
Exact replica of this configuration http://blog.backblaze.com/2011/07/20/petabytes-on-a-budget-v2-0revealing-more-secrets/.

We tried Ubuntu Server 12.04/Debian Stable/BSD7/BSD8 with ext4/zfs and all give us such read/write errors.
---
AlsaDevices:
 total 0
 crw-rw---T 1 root audio 116,  1 Apr 20 14:10 seq
 crw-rw---T 1 root audio 116, 33 Apr 20 14:10 timer
AplayDevices: aplay: device_list:252: no soundcards found...
ApportVersion: 2.0.1-0ubuntu2
Architecture: amd64
ArecordDevices: arecord: device_list:252: no soundcards found...
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=16877cc2-98af-4f72-b1bc-7f1ee98f6fcd
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Beta amd64 (20120413)
IwConfig:
 lo        no wireless extensions.

 eth1      no wireless extensions.

 eth0      no wireless extensions.
MachineType: Supermicro X8SIL
NonfreeKernelModules: zfs zcommon znvpair zavl zunicode
Package: linux (not installed)
PciMultimedia:

ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-23-generic root=UUID=de87ad5f-e76f-4180-a7ce-9b29c9443b9f ro
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/localadmin not ours.
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-23-generic N/A
 linux-backports-modules-3.2.0-23-generic  N/A
 linux-firmware                            1.79
RfKill:

SourcePackage: linux
Tags:  precise precise
Uname: Linux 3.2.0-23-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 05/27/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.1
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: X8SIL
dmi.board.vendor: Supermicro
dmi.board.version: 0123456789
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 24
dmi.chassis.vendor: Supermicro
dmi.chassis.version: 0123456789
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.1:bd05/27/2010:svnSupermicro:pnX8SIL:pvr0123456789:rvnSupermicro:rnX8SIL:rvr0123456789:cvnSupermicro:ct24:cvr0123456789:
dmi.product.name: X8SIL
dmi.product.version: 0123456789
dmi.sys.vendor: Supermicro

** Affects: linux (Ubuntu)
     Importance: High
         Status: Invalid


** Tags: apport-bug apport-collected kernel-bug-exists-upstream kernel-da-key precise
-- 
READ/Write FPDMA QUEUED failures
https://bugs.launchpad.net/bugs/986321
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