On Sat, Jan 03, 2004 at 04:52:06PM -0500, Andy Firman <[EMAIL PROTECTED]> wrote: > First, what is the difference between fdisk and cfdisk, > other cfdisk being curses based? Not much, you can achieve your needs in both.
> Second, I have 2 Western Digital drives. > Both model WD400BB but they were manufactured about > 6 months apart. It may be an other revision, hdd controllers can have different chipset/'bios'. Also, they may have higher density plates, so less of them enough for the same capacity. > I partioned both disk's exactly the same using cfdisk > during the install. It seems that one drive has 4863 cylinders > and the other has 77545 cylinders. Can be a BIOS setting, check that both drives use the same addressing method (CHS, LBA, other). > Why would Western Digital > make the drives different? Or did I do something wrong > with partitioning/formatting? No, partitioning is ok IMHO. What you don't know that hdd size is calculated from a triplet: Cylinders, Headers, Sectors: > Disk Drive: /dev/hda > Size: 40000000000 bytes > Heads: 255 Sectors per Track: 63 Cylinders: 4863 > Disk Drive: /dev/hdd > Size: 40020664320 bytes > Heads: 16 Sectors per Track: 63 Cylinders: 77545 If you do the math: C*H*S*512 => you should get the size in bytes. So hdd has more Cylinders because it has less Heads value (this is not the real value, but some kind of mapped one). > Do the physical drives and partitions have to be EXACTLY the > same for RAID 1 to work properly or will the following > layouts of my drives be sufficient? Hmm. Note sure this is ok, try to set the same CHS for both drives. > /dev/hda1 * 1 122 979933+ 83 Linux Also, if I remember right, a plus sign after the size is indicating a warning that the partition does not on Cylinder boundary, which may be a problem as partitions may overlap a bit. Cheers, GCS Off-to-sleep... -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
