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! >
