Chad Leigh -- Shire.Net LLC
chad at shire.net
Sun Feb 20 04:47:29 GMT 2005
On Feb 19, 2005, at 6:39 PM, Spades wrote:
> How do we check if FreeBSD recorgnises it as individual drives or
> Hardware RAID array.
Your raid chip appears to be a software ATA raid. man ata
The raid appears as arN according to man ata
look in the dmesg to see what happened at boot -- this will tell you
how the controller and drives were found by FreeBSD
> ----- Original Message ----- From: "Chad Leigh -- Shire.Net LLC"
> <chad at shire.net>
> To: "Sandy Rutherford" <sandy at krvarr.bc.ca>
> Cc: <freebsd-questions at freebsd.org>; "Spades" <spades at galaxynet.org>
> Sent: Saturday, February 19, 2005 5:46 PM
> Subject: Re: raid1
> On Feb 19, 2005, at 12:37 AM, Sandy Rutherford wrote:
>>>>>>> On Fri, 18 Feb 2005 23:51:53 -0700,
>>>>>>> "Chad Leigh -- Shire.Net LLC" <chad at shire.net> said:
>>> On Feb 18, 2005, at 11:39 PM, Spades wrote:
>>>> hi, my server hardware supports hardware raid, i installed it
>>>> as per normal freebsd 5.3, however i see no difference
>>>> in df. its using 2 x 160GB, what do i do during the installation
>>>> to enable the raid?
>>>> -bash-2.05b$ df
>>>> Filesystem 1K-blocks Used Avail Capacity Mounted on
>>>> /dev/ad4s1a 66008394 35424 60692300 0% /
>>>> devfs 1 1 0 100% /dev
>>> What do you expect to see?
>>> A raid1 is a mirror set and to the OS would probably look like a
>>> drive if it truly is a HW raid
>> This should be true of any hardware RAID level, not just RAID1. The
>> HW RAID presents logical drives to the OS, which look like real drives
>> to it. The caveat is that the RAID driver will appear as the disk
>> type. I don't have any experience with SATA RAID, but on my server,
>> which has a Mylex ExtremeRAID 1100 SCSI RAID card, a df gives:
>> Filesystem 1K-blocks Used Avail Capacity Mounted on
>> /dev/mlxd0s1a ...
>> /dev/mlxd0s1d ...
>> /dev/mlxd0s1h ...
>> /dev/mlxd0s1e ...
>> /dev/mlxd0s1f ...
>> /dev/mlxd0s1g ...
>> /dev/mlxd1s1e ...
>> /dev/mlxd1s1f ...
>> /dev/mlxd1s1g ...
>> /dev/mlxd2s1e ...
>> mlx(4) is the driver for this card. The underlying hard drive
>> structure doesn't look anything like the above, but this is irrelevant
>> to the OS.
>> Regarding your situation, I believe that your MB uses an Adaptec SATA
>> controller. You should find out exactly what the controller is and if
>> it is supported in "Hardware Notes". I would expect that if your
>> controller is supported and found, then "ad" should be replaced by the
>> relevant driver. Also, have a look at the dmesg output. There should
>> be some sign that the OS is recognizing your RAID controller.
> According to the MB specs at the URL given by the OP, the SATA is an
> Intel 6300ESB (part of a more general IO chip)
> " • 6300ESB (Hance Rapids) SATA Controller (2x Drive support)
> • 2x SATA Ports
> • RAID 0, 1, JBOD support"
> I don't see any specific mention of this in any of the HW notes for
> 5.3. I would be interested to see the dmesg output at boot time to see
> what the system sees for devices and controllers. If it is an ATA raid
> (pseudo HW RAID) then it would show as arX devices and not adX
> according to the handbook.
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