Re: How to use 200 GB Disk on Ultra10?
On Sun, 2005-01-02 at 07:16 +0100, Roland Rick wrote:
> Hi everybody
>
> I have an old Ultra10 and want to use it as RAID1 mirror. Unfortunately I
> may not correctly see my 200 GB disks...
>
> Open Boot PROM: 3.11
>
> Disk parameters, Maxtor modell 6Y200P0:
> HDS:SECT = 16:63
> Max Cyls = 16'383
> MaxLba = 398'297'088
> Act Cyl = 395'136
> GB Capacity = 200
>
> If I try to partition with "s" an Sun device, and entering with "0"
> - 16 heads (default)
> - 63 sectors (default)
> - 16'381 cylinders (default: about 4567, cannot remember exactly)
> - 2 spare cylinders (= 16'383 physical cyl.)
> - interleave factor 1 (default)
> - 0 extra sectors per cyl (defaut),
> I get only a disk size of about 8 GB.
>
> What make I wrong?
> Is the disk size 200 GB not available for OBP 3.11?
capacity = heads x sectors x cylinders x 512 bytes/sector
16 x 63 x 16381 x 512 ~= 8GB
I understand that there are limits on the three values in a U10, I
believe 255 heads, 63 sectors, and 16383 cyl.
120G and 80G drives work okay in my U10, with OBP 3.19.4 1999/04/28.
Geometries are 14593 cyl, 255 heads, 63 sectors, and 9729/255/63
respectively.
> => Who knows a workaround?
Candidate: recent kernel 2.6 with USB's EHCI (USB2) support + USB2 card
+ external USB2 drive box. (As others have indicated you would still
need an internal drive to boot.) On another platform I get bonnie++
sequential read and write test results from an external USB2 drive of
around 30 megabytes/sec, about double the rate for the similar vintage
internal drives on the U10.
-- good luck, SP
>
> I would really appreciate any help!
>
> Cheers, Roland
>
> PS: Happy new year!
>
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