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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

** Also affects: linux via
   http://bugzilla.kernel.org/show_bug.cgi?id=60596
   Importance: Unknown
       Status: Unknown

** Changed in: linux (Ubuntu)
       Status: Confirmed => Triaged

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https://bugs.launchpad.net/bugs/1193809

Title:
  SATA Multiplier Timeout instead of automatic spin-up severly prolongs
  boot

Status in The Linux Kernel:
  Unknown
Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  I have an external housing with 15 disks, (with 3 SATA multipliers  a
  5 disks each as far as i can tell).

  [    5.544035] ata4: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
  [    5.544331] ata4.15: Port Multiplier 1.1, 0x1095:0x3726 r23, 6 ports, feat 0x1/0x9
  [    5.545460] ata4.00: hard resetting link

  This housing is configured to NOT spin up the disks on power on.

  Booting up take extremly long, on the order of 5 minutes or so. The
  problem is, instead of spinning up the disks via software, after
  accessing  each disk for the first time, the kernel goes into an error
  condition and starts from the beginning:

  [   16.428193] ata4.01: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
  [   16.428225] ata4.02: hard resetting link
  [   26.428023] ata4.02: softreset failed (timeout)
  [   29.428038] ata4.15: qc timeout (cmd 0xe4)
  [   29.428051] ata4.02: failed to read SCR 0 (Emask=0x5)
  [   29.428055] ata4.02: reset failed, giving up
  [   29.428104] ata4.15: hard resetting link
  [   39.436023] ata4.15: softreset failed (timeout)
  [   39.436068] ata4.15: hard resetting link
  [   41.636029] ata4.15: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
  [   41.636260] ata4.00: hard resetting link
  [   41.988175] ata4.00: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
  [   41.988201] ata4.01: hard resetting link
  [   42.340177] ata4.01: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
  [   42.340203] ata4.02: hard resetting link
  [   42.692175] ata4.02: SATA link up 3.0 Gbps (SStatus 123 SControl 320)
  [   42.692200] ata4.03: hard resetting link
  [   52.692023] ata4.03: softreset failed (timeout)
  [   55.692028] ata4.15: qc timeout (cmd 0xe4)
  ....
  and so on.

  Looking at the storage housing, i can see that the kernel tries to
  access the first disk (and i hear it spinning up) and the screen show
  immediatly a timeout. Then nothing happens for a number of seconds,
  the kernel accesses the first disk again (succeding) and times out
  while the seconds disk is spinning up and so on.

  After the first five disks are spun up (first multiplier), the kernel
  accesses all disks once more (after the last multiplier reset) and
  succeeds, and then gets stuck on the second multiplier. And then on
  the third...

  I can't be certain of that, but i'm pretty sure i hear the already
  spun up disks parking/unparking the heads when the multiplier gets
  reset (which can't be good, either).

  I think the correct solution would be to implement a staggered spin-up
  of the disks. Like sending a spin-up command (or whatever the kernel
  usually uses to wake up disks) to all ports of the multiplier, delayed
  by 250ms or so,  before doing the the disk detection. This should
  speed up boot considerably and will most likely reduce wear on the
  disks.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-23-generic 3.8.0-23.34
  ProcVersionSignature: Ubuntu 3.8.0-23.34-generic 3.8.11
  Uname: Linux 3.8.0-23-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.9.2-0ubuntu8.1
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Sun Jun 23 12:38:49 2013
  HibernationDevice: RESUME=UUID=40dffe0d-945c-43d2-b196-783d72d41937
  InstallationDate: Installed on 2013-01-28 (145 days ago)
  InstallationMedia: Xubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
  IwConfig:
   eth5      no wireless extensions.
   
   eth6      no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb:
   Bus 002 Device 002: ID 046d:c018 Logitech, Inc. Optical Wheel Mouse
   Bus 002 Device 003: ID 051d:0002 American Power Conversion Uninterruptible Power Supply
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: empty empty
  MarkForUpload: True
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-23-generic root=UUID=9bbfc83a-95f8-413a-b412-5b2091205864 ro
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-23-generic N/A
   linux-backports-modules-3.8.0-23-generic  N/A
   linux-firmware                            1.106
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to raring on 2013-04-26 (57 days ago)
  dmi.bios.date: 10/22/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 'V2.06     '
  dmi.board.asset.tag: empty
  dmi.board.name: S2932/S2932-E/S2932-SI
  dmi.board.vendor: TYAN Computer Corporation
  dmi.board.version: empty
  dmi.chassis.asset.tag: empty
  dmi.chassis.type: 3
  dmi.chassis.vendor: empty
  dmi.chassis.version: empty
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr'V2.06':bd10/22/2009:svnempty:pnempty:pvrempty:rvnTYANComputerCorporation:rnS2932/S2932-E/S2932-SI:rvrempty:cvnempty:ct3:cvrempty:
  dmi.product.name: empty
  dmi.product.version: empty
  dmi.sys.vendor: empty

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