Problems with ccd on -cur [i386]

[mm]

Hi list!
I have two identical 400 GB disks and I am trying to combine them with
ccd. But if I run disklabel -r -v ccd0 I get these Error:

# disklabel -v -r ccd0
reading label from block 0, offset 512
disklabel: no disklabel found. scanning.
disklabel: no disk label

This is what i have done:
# disklabel -E wd1 (create a d partition (type ccd) with an offset of
one cylinder (16065))
# disklabel -E wd2 (same as wd1)
# ccdconfig ccd0 16 none /dev/wd1d /dev/wd2d

# disklabel -v -r wd1
# Inside MBR partition 3: type A6 start 63 size 781417602
reading label from block 63, offset 575
# /dev/rwd1c:
type: ESDI
disk: ESDI/IDE disk
label: SAMSUNG HD400LD
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 255
sectors/cylinder: 16065
cylinders: 48641
total sectors: 781422768
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0 # microseconds
track-to-track seek: 0 # microseconds
drivedata: 0

16 partitions:
# size offset fstype [fsize bsize cpg]
c: 781422768 0 unused 0 0
d: 781401600 16065 ccd

# disklabel -E ccd0
Initial label editor (enter '?' for help at any prompt)
> p
device: /dev/rccd0c
type: ccd
disk: ccd
label: fictitious
bytes/sector: 512
sectors/track: 16
tracks/cylinder: 2
sectors/cylinder: 32
cylinders: 48837600
total sectors: 1562803200
free sectors: 1040209236
rpm: 3600

16 partitions:
# size offset fstype [fsize bsize cpg]
c: 1562803200 0 unused 0 0
i: 1555194568 1040209236 unknown

Any ideas?? I can post dmesg or any other output if somebody needs it.

Thaks for reading.

-mm

[Joachim Schipper]

mm <m...@spam.me.co.uk> wrote:
> Hi list!
> I have two identical 400 GB disks and I am trying to combine them with
> ccd. But if I run disklabel -r -v ccd0 I get these Error:
>
> # disklabel -v -r ccd0
> reading label from block 0, offset 512
> disklabel: no disklabel found. scanning.
> disklabel: no disk label

Don't you just need to create a disklabel on the ccd device (ccd is
again a block device, which again needs a disklabel)?

> This is what i have done:
> # disklabel -E wd1 (create a d partition (type ccd) with an offset of
> one cylinder (16065))
> # disklabel -E wd2 (same as wd1)
> # ccdconfig ccd0 16 none /dev/wd1d /dev/wd2d

> # disklabel -E ccd0

[mm]

Joachim Schipper schrieb:

> mm <m...@spam.me.co.uk> wrote:
>> Hi list!
>> I have two identical 400 GB disks and I am trying to combine them with
>> ccd. But if I run disklabel -r -v ccd0 I get these Error:
>>
>> # disklabel -v -r ccd0
>> reading label from block 0, offset 512
>> disklabel: no disklabel found. scanning.
>> disklabel: no disk label
>
> Don't you just need to create a disklabel on the ccd device (ccd is
> again a block device, which again needs a disklabel)?

Afiak needs ccd a disklabel as a normal disk. This is why you have to
skip one zylinder at the component disks.

[Joachim Schipper]

mm <m...@spam.me.co.uk> wrote:
> Joachim Schipper schrieb:
>> mm <m...@spam.me.co.uk> wrote:
>>> Hi list!
>>> I have two identical 400 GB disks and I am trying to combine them with
>>> ccd. But if I run disklabel -r -v ccd0 I get these Error:
>>>
>>> # disklabel -v -r ccd0
>>> reading label from block 0, offset 512
>>> disklabel: no disklabel found. scanning.
>>> disklabel: no disk label
>>
>> Don't you just need to create a disklabel on the ccd device (ccd is
>> again a block device, which again needs a disklabel)?
> Afiak needs ccd a disklabel as a normal disk.

Yes. Have you created a disklabel on the ccd device? You also need a
disklabel on the component disks, of course, but you appear to have done
that in a fashion that will, at least, work.

> This is why you have to
> skip one zylinder at the component disks.

Umm... what?

For the record, I hope someone else here is willing to help you further,
because I am leaving on holiday tomorrow - I'm packing right now.

Joachim

[mm]

Joachim Schipper schrieb:
> mm <m...@spam.me.co.uk> wrote:
>> Joachim Schipper schrieb:
>>> mm <m...@spam.me.co.uk> wrote:
>>>> Hi list!
>>>> I have two identical 400 GB disks and I am trying to combine them with
>>>> ccd. But if I run disklabel -r -v ccd0 I get these Error:
>>>>
>>>> # disklabel -v -r ccd0
>>>> reading label from block 0, offset 512
>>>> disklabel: no disklabel found. scanning.
>>>> disklabel: no disk label
>>> Don't you just need to create a disklabel on the ccd device (ccd is
>>> again a block device, which again needs a disklabel)?
>> Afiak needs ccd a disklabel as a normal disk.
>
> Yes. Have you created a disklabel on the ccd device? You also need a
> disklabel on the component disks, of course, but you appear to have done
> that in a fashion that will, at least, work.

I tried to create a disklabel on ccd, but after deleting the i
partition, creating a d partion an a reboot I get a
ccdconfig: ioctl (CCDIOCSET): /dev/ccd0c: Device busy and
# disklabel -E ccd
disklabel: /dev/rccd: No such file or directory

>> This is why you have to
>> skip one zylinder at the component disks.
>
> Umm... what?
>

Afiak you have to skip at least one cylinder at each component disk (In
my case I set an offset of 16065 on wd1 and wd2)

> For the record, I hope someone else here is willing to help you further,

I hope so too.

> because I am leaving on holiday tomorrow - I'm packing right now.

Enjoy our holyday. =)