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RAID questions...
I'm working on putting together an OpenBSD 3.6 box with a RAID5 array as
a home media file server and have a few questions I couldn't find
answers to on the various doc/howto pages. I was wondering if someone
here could shed some insight... My hardware setup is 4 Seagate Barracuda
160gb IDE drives for the raid and a 40gb boot drive.
All of the examples I've seen for the raid.conf file show them using
/dev/wd0e, /dev/wd1e, /dev/wd2e, etc. for devices, is there a particular
reason they're not using the 'a' partitions? (IE /dev/wd0a, /dev/wd1a,
etc..) I'll be using dedicated drives, so they'd only have one 'a'
partition taking up the whole drive.
When doing the array verification ("raidctl -iv raid0"), I get about a
hundred or so soft errors across all 4 devices.
Jan 1 03:32:46 cartman /bsd: wd1a: DMA error reading fsbn 2800992 of
2800992-2801023 (wd1 bn 2801055; cn 2778 tn 13 sn 12), retrying
Jan 1 03:32:46 cartman /bsd: wd1: soft error (corrected)
There are some occasional DMA downgrades from UDMA mode 4 to UDMA 3. Is
this at all acceptable? I remember reading somewhere that this can be
due to interference on the hardware (cable crosstalk, etc.) and that
it's just the nature of the beast.
In my particular case, after I've gone through and created the raid
array and verified it, I run "disklabel -E raid0" to set up the mount
points and the array is only showing 24gb of available space (even after
zeroing out the partition table). What could be causing this? There's
some lines at the bottom of my dmesg (below), about disks being
truncated - that sounds ominous, but I'm not sure what's causing it.
Note that in the examples below, I've not yet set the disk label, so I'm
OK with those error messages.
Again, I'd greatly appreciate any help on this matter... Thanks!
# disklabel -E raid0
Jan 1 04:33:55 cartman /bsd: raid0: no disk label
Jan 1 04:33:55 cartman /bsd: raid0: no disk label
disklabel: Can't get bios geometry: Device not configured
Initial label editor (enter '?' for help at any prompt)
> p G
device: /dev/rraid0c
type: RAID
disk: raid
label: fictitious
bytes/sector: 512
sectors/track: 96
tracks/cylinder: 16
sectors/cylinder: 1536
cylinders: 32253
total sectors: 49541760
free sectors: 49541760
rpm: 3600
16 partitions:
# size offset fstype [fsize bsize cpg]
c: 23.6G 0.0G unused 0 0 # (Cyl. 0 -
32253*)
i: 1.0G 1.0G unused 0 0 # (Cyl. 1365*- 2687)
j: 1.0G 1.0G unused 0 0 # (Cyl. 1365*- 2687)
k: 1.0G 1.0G unused 0 0 # (Cyl. 1365*- 2687)
l: 1.0G 1.0G unused 0 0 # (Cyl. 1365*- 2687)
>
#raidctl -s raid0
Jan 1 04:39:13 cartman /bsd: raid0: no disk label
Jan 1 04:39:13 cartman /bsd: raid0: no disk label
raid0 Components:
/dev/wd0a: optimal
/dev/wd1a: optimal
/dev/wd2a: optimal
/dev/wd3a: optimal
No spares.
Parity status: clean
Reconstruction is 100% complete.
Parity Re-write is 100% complete.
Copyback is 100% complete.
#dmesg
OpenBSD 3.6-stable (GENERIC_RAID) #0: Fri Dec 31 10:29:52 PST 2004
root@cartman.casadelove.com:/usr/src/sys/arch/i386/compile/GENERIC_RAID
cpu0: AMD Athlon(tm) XP 2100+ ("AuthenticAMD" 686-class) 1.74 GHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE
real mem = 536383488 (523812K)
avail mem = 481951744 (470656K)
using 4278 buffers containing 26923008 bytes (26292K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(8a) BIOS, date 11/06/02, BIOS32 rev. 0 @ 0xfb440
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev 2.1 @ 0xf0000/0xdf84
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdee0/160 (8 entries)
pcibios0: PCI Exclusive IRQs: 5 10 11
pcibios0: PCI Interrupt Router at 000:17:0 ("VIA VT82C596A ISA" rev 0x00)
pcibios0: PCI bus #1 is the last bus
bios0: ROM list: 0xc0000/0x9000 0xcc000/0x8000! 0xd4000/0x2800
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "VIA VT8366 PCI" rev 0x00
ppb0 at pci0 dev 1 function 0 "VIA VT8366 AGP" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "Matrox MGA G550 AGP" rev 0x01
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
re0 at pci0 dev 9 function 0 "Realtek 8169" rev 0x10: irq 5, address
00:09:5b:be:4d:5e
rgephy0 at re0 phy 7: RTL8169S/8110S media interface, rev. 0 PHY
re0: diagnostic failed, failed to receive packet in loopback mode
re0: attach aborted due to hardware diag failure
pciide0 at pci0 dev 10 function 0 "Promise PDC20269" rev 0x02: DMA,
channel 0 configured to native-PCI, channel 1 configured to native-PCI
pciide0: using irq 10 for native-PCI interrupt
wd0 at pciide0 channel 0 drive 0: <ST3160023A>
wd0: 16-sector PIO, LBA48, 152627MB, 312581808 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
wd1 at pciide0 channel 1 drive 0: <ST3160023A>
wd1: 16-sector PIO, LBA48, 152627MB, 312581808 sectors
wd1(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 5
pciide1 at pci0 dev 12 function 0 "Promise PDC20271" rev 0x02: DMA,
channel 0 configured to native-PCI, channel 1 configured to native-PCI
pciide1: using irq 10 for native-PCI interrupt
wd2 at pciide1 channel 0 drive 0: <ST3160023A>
wd2: 16-sector PIO, LBA48, 152627MB, 312581808 sectors
wd2(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 5
wd3 at pciide1 channel 1 drive 0: <ST3160023A>
wd3: 16-sector PIO, LBA48, 152627MB, 312581808 sectors
wd3(pciide1:1:0): using PIO mode 4, Ultra-DMA mode 5
pcib0 at pci0 dev 17 function 0 "VIA VT8366 ISA" rev 0x00
pciide2 at pci0 dev 17 function 1 "VIA VT82C571 IDE" rev 0x06: ATA100,
channel 0 configured to compatibility, channel 1 configured to compatibility
wd4 at pciide2 channel 0 drive 0: <IC35L040AVVN07-0>
wd4: 16-sector PIO, LBA, 39266MB, 80418240 sectors
wd4(pciide2:0:0): using PIO mode 4, Ultra-DMA mode 5
atapiscsi0 at pciide2 channel 1 drive 1
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <LITE-ON, DVD SOHD-167T, 9S15> SCSI0
5/cdrom removable
cd0(pciide2:1:1): using PIO mode 4, Ultra-DMA mode 2
uhci0 at pci0 dev 17 function 2 "VIA VT83C572 USB" rev 0x1b: irq 11
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
uhci1 at pci0 dev 17 function 3 "VIA VT83C572 USB" rev 0x1b: irq 11
usb1 at uhci1: USB revision 1.0
uhub1 at usb1
uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
uhci2 at pci0 dev 17 function 4 "VIA VT83C572 USB" rev 0x1b: irq 11
usb2 at uhci2: USB revision 1.0
uhub2 at usb2
uhub2: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
auvia0 at pci0 dev 17 function 5 "VIA VT8233 AC97" rev 0x30: irq 10
ac97: codec id 0x414c4710 (Avance Logic ALC200)
ac97: codec features headphone, 18 bit DAC, 18 bit ADC, Realtek 3D
audio0 at auvia0
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
lm0 at isa0 port 0x290/8: W83697HF
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
biomask ff45 netmask ff65 ttymask ffe7
pctr: user-level cycle counter enabled
mtrr: Pentium Pro MTRR support
Kernelized RAIDframe activated
dkcsum: wd0 matched BIOS disk 81
dkcsum: wd1 matched BIOS disk 82
dkcsum: wd2 had no matching BIOS disk
dkcsum: wd3 had no matching BIOS disk
dkcsum: wd4 matched BIOS disk 80
root on wd4a
rootdev=0x40 rrootdev=0x340 rawdev=0x342
uhub3 at uhub0 port 2
uhub3: ATEN International product 0x7000, class 9/0, rev 1.10/1.00, addr 2
uhub3: 4 ports with 4 removable, self powered
uhidev0 at uhub3 port 1 configuration 1 interface 0
uhidev0: Logitech Logitech USB Keyboard, rev 1.10/15.00, addr 3, iclass 3/1
ukbd0 at uhidev0: 8 modifier keys, 6 key codes
wskbd1 at ukbd0 mux 1
wskbd1: connecting to wsdisplay0
uhidev1 at uhub3 port 1 configuration 1 interface 1
uhidev1: Logitech Logitech USB Keyboard, rev 1.10/15.00, addr 3, iclass 3/0
uhidev1: 3 report ids
uhid0 at uhidev1 reportid 1: input=2, output=0, feature=0
uhid1 at uhidev1 reportid 2: input=1, output=0, feature=0
ums0 at uhidev1 reportid 3: 0 buttons and Z dir.
wsmouse0 at ums0 mux 0
uhidev2 at uhub3 port 2 configuration 1 interface 0
uhidev2: Logitech USB Mouse, rev 1.10/6.10, addr 4, iclass 3/1
ums1 at uhidev2: 3 buttons and Z dir.
wsmouse1 at ums1 mux 0
raid0: Component /dev/wd0a being configured at row: 0 col: 0
Row: 0 Column: 0 Num Rows: 1 Num Columns: 4
Version: 2 Serial Number: 5150 Mod Counter: 48
Clean: Yes Status: 0
raid0: Component /dev/wd1a being configured at row: 0 col: 1
Row: 0 Column: 1 Num Rows: 1 Num Columns: 4
Version: 2 Serial Number: 5150 Mod Counter: 48
Clean: Yes Status: 0
raid0: Component /dev/wd2a being configured at row: 0 col: 2
Row: 0 Column: 2 Num Rows: 1 Num Columns: 4
Version: 2 Serial Number: 5150 Mod Counter: 48
Clean: Yes Status: 0
raid0: Component /dev/wd3a being configured at row: 0 col: 3
Row: 0 Column: 3 Num Rows: 1 Num Columns: 4
Version: 2 Serial Number: 5150 Mod Counter: 48
Clean: Yes Status: 0
WARNING: truncating disk at r 0 c 0 to 16513937 blocks.
WARNING: truncating disk at r 0 c 1 to 16513937 blocks.
raid0 (root)raid0: no disk label