raid or not raid

doug at safeport.com doug at safeport.com
Thu May 24 18:27:19 UTC 2007


On Thu, 24 May 2007, kalin mintchev wrote:

>
>> Also what type of RAID?  If it's Hardware RAID _and_ it's using a 3ware
>> card,
>
> doubt it. i don't see anything that ponts to that in the pciconf output..
>
>> you can install tw_cli from /usr/ports/sysutils.  It's a nice
>> little utility and will show you the status of your units/ports/drives
>> and how many drives you have on that controller.
>>

I have a similiar setup and some RAID controller will appear as ad4. I have 
RAID5 on a Dell PE2400. There is no doubt it's RAID since I put the disks in and 
formatted the array. So I am pretty sure :)

This is a fairly old machine and FreeBSD does not support the controller in that 
to do any kind of repairs/changes to the array must be done via the BIOS.

______________
The dmesg:

atapci0: <GENERIC ATA controller> port 
0xfc00-0xfc0f,0x376,0x170-0x177,0x3f6,0x1f0-0x1f7 at device
31.1 on pci0
ata0: channel #0 on atapci0
ata1: channel #1 on atapci0
atapci1: <GENERIC ATA controller> port 
0xbc60-0xbc6f,0xbc78-0xbc7b,0xbc80-0xbc87,0xbc90-0xbc93,0xbc
98-0xbc9f irq 20 at device 31.2 on pci0
ata2: channel #0 on atapci1
ata3: channel #1 on atapci1
 	:
ad4: 76293MB <WDC WD800JD-75MSA2/10.01E03> [155009/16/63] at ata2-master UDMA33
Mounting root from ufs:/dev/ad4s3a

_______________
df
Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
/dev/ad4s3a    507630    58900   408120    13%    /
devfs               1        1        0   100%    /dev
/dev/ad4s3g  61419970 44879206 11627168    79%    /home
/dev/ad4s3e    507630       70   466950     0%    /tmp
/dev/ad4s3f   6090094  1807368  3795520    32%    /usr
/dev/ad4s3d   3045006  1431302  1370104    51%    /var

That said it works perfectly (if invisibly). I have had single disk failures 
over the years and happily raid'ed on until I could swap out the disk and 
rebuild the array. Unfortunately the only thing hot about the swap was my blood 
pressure.

So the answer is you can not tell that its not RAID. If you have a remote 
console and can see the BIOS messages on a reboot - that should clear it up

I hope this helps


More information about the freebsd-questions mailing list