Need advice on building a system with a Raid drive
Bob Bomar
bob at ibsd.us
Wed Jul 13 16:18:44 GMT 2005
On Wed, Jul 13, 2005 at 10:23:13AM -0500, Jim Freeze wrote:
> Hi
>
> I am building a new system and plan to use two
> 300GB drives in a raid 1 configuration. However,
> I have read where fbsd can't boot from a raid
> drive, but it is not clear why.
>
> Can anyone confirm if this is a valid restriction?
> Will I really need a boot drive separate from my
> raid drives?
>
I have 3 machines that boot from RAID 1 just fine, 1 uses
a Promise RAID Card, FastTrak 100 with 2 Hot Swap Enclosures,
and the other 2 use the promise raid on the motherboards, one
is a MSI, other is Gigabyte.
I like the promise cards, as atacontrol(8) works great
with them.
dmesg from my server:
Drives:
ad4: DMA limited to UDMA33, non-ATA66 cable or device
ad6: DMA limited to UDMA33, non-ATA66 cable or device
ar0: 113487MB <ATA RAID1 array> [14467/255/63] status: READY subdisks:
0 READY ad4: 114440MB <WDC WD1200JB-75CRA0> [232514/16/63] at ata2-master UDMA3
3
ad4: SuperSwap enclosure [FAN:3879rpm TEMP:29.0C 5.103V 12.383V]
1 READY ad6: 114440MB <WDC WD1200JB-75CRA0> [232514/16/63] at ata3-master UDMA3
3
ad6: SuperSwap enclosure [FAN:4166rpm TEMP:28.0C 5.049V 12.261V]
ar1: 76293MB <ATA RAID1 array> [9726/255/63] status: READY subdisks:
0 READY ad8: 76319MB <WDC WD800JB-00CRA1> [155061/16/63] at ata4-master UDMA100
1 READY ad10: 76319MB <WDC WD800JB-00CRA1> [155061/16/63] at ata5-mast
er UDMA100
Waiting 2 seconds for SCSI devices to settle
Mounting root from ufs:/dev/ar0s1a
da0 at isp0 bus 0 target 2 lun 0
da0: <IBM DCAS-34330W S60B> Fixed Direct Access SCSI-2 device
da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
da0: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C
Cards:
atapci1 at pci0:12:0: class=0x010485 card=0x1275105a chip=0x5275105a rev=0x01 hdr=0x00
vendor = 'Promise Technology Inc'
device = 'PDC20276 Ultra133 TX2/FastTrak TX Lite EIDE Controller'
class = mass storage
subclass = RAID
atapci0 at pci0:6:0: class=0x010485 card=0x4d68105a chip=0x6268105a rev=0x02 hdr=0x00
vendor = 'Promise Technology Inc'
device = 'PDC20268R FastTrak100 TX2/TX4/LP EIDE controller'
class = mass storage
subclass = RAID
--
Bob Bomar
bob at ibsd.us
-----------------------------
FreeBSD: The Power to Serve
http://www.freebsd.org
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