Date: Mon, 26 Jun 1995 19:37:35 +0200 From: Stefan Petri <petri@ibr.cs.tu-bs.de> To: freebsd-scsi@freebsd.org Subject: strange scsi-disk-geomety on FreeBSD 2.0.5 Message-ID: <199506261737.TAA04776@achill.ibr.cs.tu-bs.de>
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Hi!
My system is running ok, but:
with 2.0.5-RELEASE, I get strange drive geometries reported from the
scsi device mode page 4:
42 # scsi -f /dev/sd0 -v -m 4
Number of Cylinders: 3658
????
Number of Heads: 4
?
Starting Cylinder-Write Precompensation: 3658
Starting Cylinder-Reduced Write Current: 3658
Drive Step Rate: 0
Landing Zone Cylinder: 0
RPL: 0
Rotational Offset: 0
Medium Rotation Rate: 0
The same numbers are reported when booting with verbose flag:
ncr0 <ncr 53c810 scsi> rev 1 int a irq 9 on pci0:1
reg20: virtual=0xf2a58000 physical=0xfbfef000 size=0x100
ncr0: restart (scsi reset).
ncr0 scanning for targets 0..6 (V2 pl21 95/03/21)
(ncr0:1:0): "QUANTUM LIGHTNING 730S 241E" type 0 fixed SCSI 2
sd0(ncr0:1:0): Direct-Access
sd0(ncr0:1:0): FAST SCSI-2 100ns (10 Mb/sec) offset 8.
699MB (1431760 512 byte sectors)
sd0(ncr0:1:0): with 3658 cyls, 4 heads, and an average 97 sectors/track
???? ? ??
However, the 950412-SNAP as well as Linux tell me the correct values
(1020 Cyl, 23 heads, 61 sectors/track), so I presume the cause is not
in my hardware (Intel 486 DX/4 100MHz, ASUS SP3G with on-board NCR
810, Quantum Lightning 730S).
fdisk also reports this strange number cylinders, but gets the heads
and sectors right (probably from the disklabel, that also has the
correct geometry)
I have stared at the source diffs, but cannot find a hint to the
reason for this strange behaviour.
Stefan
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