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Old 7th November 2008
phreud phreud is offline
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Default Disk geometry for Seagate disk

I'm trying to install FreeBSD 7 onto a 1TB Seagate SATA disk. When I reach the FDISK part it complains about the geometry being wrong. FDISK reports using 121601/255/63. I've tried to find out the correct numbers from a Seagate datasheet, but I'm not sure which numbers to use. specs are at page 10, model ST31000340AS.

From what I read, I thought it should be 16383/16/63, but that results in FDISK reporting 16 514 064 sectors total and 8063 MB. According to the datasheet it should be 1 953 525 168 total, right?

Can anyone please help?
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Old 7th November 2008
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graudeejs graudeejs is offline
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how are you installing freebsd?

fdisk complains about my disk all the time when i use it manually
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Old 7th November 2008
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I've seen these geometry complaints since FreeBSD 2. I've always accepted the defaults. It's never caused a problem. I did use other values once. Never noticed any difference. I think that that 'wrong geometry' stuff is older than the hills, actually.
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Old 7th November 2008
richardpl richardpl is offline
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Quote:
Originally Posted by phreud View Post
I'm trying to install FreeBSD 7 onto a 1TB Seagate SATA disk. When I reach the FDISK part it complains about the geometry being wrong. FDISK reports using 121601/255/63
What? 121601/255/63 doesnt work?
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Old 7th November 2008
phreud phreud is offline
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I got it working eventually. The thing that threw me off was that I kept getting the message over and over again. Choosing entire disk - Warning. Setting bootable - Warning. Writing the slices - Warning. I'm used to getting the warning just once and then keep going. After clicking "Ok" to all of the warnings, everything installed fine.

From within the system, I now get for FDISK ad0:

cylinders=1938021, heads=16, sectors/track=63 and a total of 1953520002 (953867 Meg). I guess it won't go much higher for a 1TB disk? It's never gonna come to the same figure as in the datasheet (1953525168), right?
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Old 8th November 2008
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That warning is technically correct, but redundant. I think it has to do with the way disks remap themselves these days.

Ignore the warning. It's noise.
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