jaclaz, on 08 August 2011 - 02:39 AM, said:
As well, the "Sector per Head" is "intentional", since we have (on hard disks) an addressing convention called CHS (and not CTS) and AFAIK/AFAICR "Track" is used almost exclusively in conjunction with "real" floppies, I thought it to be more descriptive, but this is part of the naming convention that I would like to get a "common agreement upon", just like "Sectors Before" vs. "Hidden Sectors".
"Sectors per Head" would not make much sense since that would be half of a entire Floppy Disk.
The concept of Cylinders and Heads, sometimes even Sectors, is meaningless on Hard Disks as they use Zone Recording. Even though Floppies have "Tracks", you do not address them as such in the controller. You select a Head that can access the desired Range of Tracks. This is why you have CHS not CTS.
About serial, is not a problem to calculate a "random one", I even have *somewhere* a (clever
) spreadsheet I made to calculate (for forensic scopes) the probabilities of a serial to be an actually "kosher generated" one or a "random" (please read as "counterfeited" one.
Since the algorithm is (partially) reversible something can be done in that sense, but this is an alltogether different topic.
Typically the Volume Serial number is generated from the Current Date/Time.
@all As far as the problem with Formatting LS-120 Disks, there are at least Four different situations, listed here in increasing severity:
1. Disk accessible and Mounts.
Access: Interrupts 0x13, 0x21, 0x25, 0x26
Format: Nearly any Formatter will do.
2. Disk accessible but does not Mount.
Access: Interrupt 0x13
Format: Track 0 Writer, my RFDISK.
3. Disk low level Formatted, not accessible by BIOS or Windows.
Access: Direct Port I/O
Format: Low level Disk Utilities, SCSI Tools, My RFDISK (raw mode maybe). For SCSI devices, use Command 4 (Format).
4. Disk blank, bulk-erased, or headers corrupted.
Access: Direct Port I/O maybe or Manufacturer only Connector or Rig.
Format: Depends (see below) Same as #3 if SCSI Command 4 works (A).
Possible Solutions for SCSI:
A: SCSI Format Command (4).
B: Undocumented SCSI Formatting Command (?). Manufacturer's tool may work.
C: Manufacturer's Formatting Rig.
D: Neighborhood Recycling Center.
I do not have a LS-120 so I don't know what is required but the previous Posts are not encouraging. Maybe a SCSI Mode Select Command followed by a SCSI Format Command would help.
A Track Zero Writer is not going to work on a bulk-erased Disk. Even if it could low level Format the Track you would still not be able to write anything to the rest of the Disk.
Low Level Formatting capability is built into the Floppy Controller so FORMAT can do the Low Level Formatting on the entire Disk before writing Track Zero. This is not generally the case with other
This post has been edited by rloew: 08 August 2011 - 01:23 PM