Firewire RAID

[Bill McGonigle]

There was some discussion at Pappy's last night about Firewire RAID 
setups on linux.  I mentioned that I've managed a stable/useful/slow 
setup for my backup system.  Here are the relevant details:

kernel:   2.6.14-1.1656_FC4

PCI: 02:0a.0 FireWire (IEEE 1394): Agere Systems FW323 (rev 61)

Module                  Size  Used by
sd_mod                 18881  2                               <--- 
hotplug didn't figure this out, insmod
sg                     37601  0
sbp2                   23365  2
scsi_mod              136553  5 sd_mod,sr_mod,ide_scsi,sg,sbp2
ohci1394               35593  0
ieee1394              297625  2 sbp2,ohci1394
ext3                  129993  3
jbd                    57813  1 ext3
raid1                  21057  4

ieee1394: Node added: ID:BUS[0-00:1023]  GUID[0050770e00071002]
ieee1394: Node added: ID:BUS[0-01:1023]  GUID[0030e001e0abe0f8]
ieee1394: Host added: ID:BUS[0-02:1023]  GUID[0000d1008018a265]
SCSI subsystem initialized
sbp2: $Rev: 1306 $ Ben Collins <bcollins at debian.org>
ieee1394: sbp2: Driver forced to serialize I/O (serialize_io=1)
ieee1394: sbp2: Try serialize_io=0 for better performance
scsi0 : SCSI emulation for IEEE-1394 SBP-2 Devices
ieee1394: sbp2: Logged into SBP-2 device
ieee1394: Node 0-00:1023: Max speed [S400] - Max payload [2048]
   Vendor: ST330063  Model: 1A                Rev:
   Type:   Direct-Access-RBC                  ANSI SCSI revision: 04
scsi1 : SCSI emulation for IEEE-1394 SBP-2 Devices
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0,  type 14
EXT3 FS on md1, internal journal
kjournald starting.  Commit interval 5 seconds
EXT3 FS on md0, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
ieee1394: sbp2: Logged into SBP-2 device
ieee1394: Node 0-01:1023: Max speed [S400] - Max payload [2048]
   Vendor: ST330083  Model: 1A                Rev:
   Type:   Direct-Access-RBC                  ANSI SCSI revision: 04
Attached scsi generic sg1 at scsi1, channel 0, id 0, lun 0,  type 14
SCSI device sda: 586072368 512-byte hdwr sectors (300069 MB)
sda: asking for cache data failed
sda: assuming drive cache: write through
SCSI device sda: 586072368 512-byte hdwr sectors (300069 MB)
sda: asking for cache data failed
sda: assuming drive cache: write through
  sda: [mac] sda1 sda2 sda3 sda4 sda5
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
SCSI device sdb: 586072368 512-byte hdwr sectors (300069 MB)
sdb: asking for cache data failed
sdb: assuming drive cache: write through
SCSI device sdb: 586072368 512-byte hdwr sectors (300069 MB)
sdb: asking for cache data failed
sdb: assuming drive cache: write through
  sdb: [mac] sdb1 sdb2 sdb3 sdb4
Attached scsi disk sdb at scsi1, channel 0, id 0, lun 0
SCSI device sda: 586072368 512-byte hdwr sectors (300069 MB)
sda: asking for cache data failed
sda: assuming drive cache: write through
  sda: sda1
SCSI device sda: 586072368 512-byte hdwr sectors (300069 MB)
sda: asking for cache data failed
sda: assuming drive cache: write through
  sda: sda1
SCSI device sdb: 586072368 512-byte hdwr sectors (300069 MB)
sdb: asking for cache data failed
sdb: assuming drive cache: write through
  sdb: sdb1
SCSI device sdb: 586072368 512-byte hdwr sectors (300069 MB)
sdb: asking for cache data failed
sdb: assuming drive cache: write through
  sdb: sdb1
md: bind<sda>
md: bind<sdb>
raid1: raid set md3 active with 2 out of 2 mirrors
md: syncing RAID array md3
md: minimum _guaranteed_ reconstruction speed: 1000 KB/sec/disc.
md: using maximum available idle IO bandwidth (but not more than 200000 
KB/sec) for reconstruction.
md: using 128k window, over a total of 293036096 blocks.
md: md3: sync done.
RAID1 conf printout:
  --- wd:2 rd:2
  disk 0, wo:0, o:1, dev:sda
  disk 1, wo:0, o:1, dev:sdb

md3 : active raid1 sdb[1] sda[0]
       293036096 blocks [2/2] [UU]


-----
Bill McGonigle, Owner           Work: 603.448.4440
BFC Computing, LLC              Home: 603.448.1668
bill at bfccomputing.com           Cell: 603.252.2606
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