hi,
this message may be a little too long, the most intriguing part is the
difference between sizes reported by the kernel (in dmesg) and bioctl.
any idea, why bioctl reports size 1 TB smaller?
i've got HP proliant dl140 with "Hewlett-Packard Smart Array" card in it.
put a couple of 1.5 TB disks put to RAID0 for testing.
i think i saw it reporting logical drive 2.9 TB or something, which
was expected.
the kernel (29 dec i386 snapshot) reports:
ciss0 at pci7 dev 8 function 0 "Hewlett-Packard Smart Array" rev 0x00:
apic 8 int 16 (irq 7)
ciss0: 1 LD, HW rev 0, FW 1.66/1.66
scsibus0 at ciss0: 1 targets
sd0 at scsibus0 targ 0 lun 0: <HP, LOGICAL VOLUME, 1.66> SCSI3 0/direct fixed
sd0: 2861534MB, 512 bytes/sec, 5860422960 sec total
5'860'422'960 sectors sounds very like it.
bioctl says:
# bioctl ciss0
Volume Status Size Device
ciss0 0 Online 2199023255040 sd0 RAID0
0 Online 1500301910016 0:0.0 noencl <ATA ST31500341AS >
1 Online 1500301910016 0:1.0 noencl <ATA ST31500341AS >
#
well, while sizes of physical disks are reported correctly, size of
sd0 is smaller: about 2 TB.
fdisk says:
# fdisk sd0
Disk: sd0 geometry: 718189/255/32 [1565455664 Sectors]
Offset: 0 Signature: 0xAA55
Starting Ending LBA Info:
#: id C H S - C H S [ start: size ]
-------------------------------------------------------------------------------
0: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
1: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
2: 00 0 0 0 - 0 0 0 [ 0: 0 ] unused
*3: A6 0 1 32 - 191844 39 26 [ 63: 1565448251 ] OpenBSD
#
so it is about 750 GB here. i wouldn't care about fdisk that much. let
alone LBA48 and possibly other stuff, apparently the MBR still uses 32
bit fields to hold the start sector and the size
(http://en.wikipedia.org/wiki/Master_boot_record). And the number the
fdisk gives looks very like "5860422960 - 2^32". so perhaps the size
the fdisk gives is an overflown value (it could be better equal to
3^32-1, closer to reality).
disklable seems to have the right number, however for OpenBSD area
boudaries it still believes to what fdisk says:
# disklabel sd0
# /dev/rsd0c:
type: SCSI
disk: SCSI disk
label: LOGICAL VOLUME
flags:
bytes/sector: 512
sectors/track: 255
tracks/cylinder: 511
sectors/cylinder: 130305
cylinders: 44974
total sectors: 5860422960
rpm: 3600
interleave: 1
boundstart: 63
boundend: 1565448314
drivedata: 0
16 partitions:
# size offset fstype [fsize bsize cpg]
a: 651525 12639585 4.2BSD 2048 16384 1 # /
b: 12639522 63 swap
c: 5860422960 0 unused
d: 2215185 13291110 4.2BSD 2048 16384 1 # /usr
e: 2215185 15506295 4.2BSD 2048 16384 1 # /var
#
luckily enough, it allows us to say we want to use the whole disk ("*"
for size rocks!), and there i have it:
f: 5842701480 17721480 4.2BSD 8192 65536 1
newfs needs to be instructed to use Enhanced Fast File System (FFS2),
otherwise it gives somewhat funny message:
# newfs /dev/rsd0f
newfs: preposterous size 5842701480, max is 2147483647
#
it could just say "the size is bigger than 2147483647, switching to
FFS2" and go further. a little chage to parameters (freed 0.2 TB for
me) and there it is shining brightly:
# df -h /mnt
Filesystem Size Used Avail Capacity Mounted on
/dev/sd0f 2.7T 8.0K 2.7T 0% /mnt
#
this the first time i mounted somthing bigger than 300 GB, so it is
"wow" for me :-)
thanks for your time!
