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- Subject: Re: Can we read/write EOD's in DOS format?
-
-
- Try the man pages for:
-
- filesystems: cdfs, dos, fat, efs, hfs, mac, iso9660, CD-ROM,
- kfs, nfs, RockRidge (4) - IRIX filesystem types
- mediad, cdromd, msdosd (1M) - handle removable media on the system
- to_dos, to_unix (1) - convert text files between MSDOS and UNIX
- fpck (1M) - check and repair either FAT (MSDOS) or HFS (MACINTOSH) file systems
- mkfp (1M) - construct a FAT (MSDOS) or HFS (MACINTOSH) file system
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-
-
-
- Frequently Asked Questions about Magneto-Optical
- Disks on Silicon Graphics Computers
-
- Bob Miller <kbob@sgi.com>
- Last updated: 8/30/94
-
-
- This document discusses issues involving Magneto-Optical removable
- disks (M-Os) under current releases of Irix, 5.2 and 5.3.
-
- ======================================
- * Are M-O drives supported under Irix?
- --------------------------------------
-
- Although SGI has not formally chosen any Magneto-Optical drives as an
- OEM product, nor have we formally tested any M-O drives, we believe
- that the the SCSI driver in IRIX does indeed provide base level
- support for M-O drives. However, applications-level software such as
- the Indigo Magic desktop does not recognize M-O drives and media.
-
- ======================================
- * What M-O drives and media can I use?
- --------------------------------------
-
- Use a SCSI M-O drive.
-
- We have used the following drive types successfully.
-
- Maxoptix Tahiti 2 and 3
- Pinnacle Micro PMO-650
- Sony SMO-S521
-
- Other brands and models are likely to work as well.
-
- Sony drives based on the 501 mechanism are not recommended. Sony no
- longer ships 501 based drives, so current models should be okay.
-
- The Sony SMO-S521 needs firmware rev. 2.03 or higher.
-
- For EFS or HFS filesystems, you must use a cartridge formatted with
- 512 byte sectors.
-
- ===============================
- * What SGI systems can use M-O?
- -------------------------------
-
- All SGI systems.
-
- =============================
- * What filesystem types work?
- -----------------------------
-
- EFS works. HFS works under Irix 5.3. FAT has not been tested. xFS
- has not been tested.
-
- HFS is the Macintosh Hierarchical File System. FAT is the filesystem
- used by PCs. EFS is SGI's Extent File System, the same filesystem
- used on SGI's hard disks. xFS is SGI's 64-bit filesystem.
-
- ===============================
- * What software works with M-O?
- -------------------------------
-
- The Irix kernel, drivers, and command line utilities work with M-O
- disks. But objectserver, mediad, the desktop, and the GUI system
- administration tools don't support them.
-
- In Irix 5.2, the GUI tools try to support M-O. But they don't always
- work, and you'll get better results if you use the command line.
-
- ==============================================================
- * How can I create a Macintosh filesystem on an M-O cartridge?
- --------------------------------------------------------------
-
- Do it on a Mac. You'll need a formatting utility, such as FWB's Hard
- Disk Toolkit or Drive7.
-
- ======================================================
- * How can I use a Macintosh filesystem on an M-O disk?
- ------------------------------------------------------
-
- You must be using Irix 5.3 or later.
-
- As superuser, create a directory where the disk will be mounted. You
- may use any directory name. This example uses the name "/MO".
-
- # mkdir /MO
-
- Mount the disk. Use the whole-volume raw device.
-
- # /etc/mount -t hfs -o rw /dev/rdsk/dks0d7vol /MO
-
- (assuming M-O is at SCSI controller 0, ID 7)
-
- ========================================================================
- * Can I use Macintosh disks with multiple partitions, encrypted data, or
- password protection?
- ----------------------
-
- No. Irix will only see the first MacOS partition on the disk. If the
- partition is encrypted, it won't be usable.
-
- Irix ignores password protection. Some Mac disk drivers encrypt
- password-protected disks. You won't be able to use those filesystems
- at all on Irix. Other Mac disk drivers do not encrypt the disks;
- you'll be able to use those file systems on Irix, but the password
- protection will be bypassed.
-
- =============================
- * How do I eject an M-O disk?
- -----------------------------
-
- You have to manually dismount the filesystem and manually eject the
- disk. The command to dismount would be
-
- # /etc/umount /MO (substitute your mount point)
-
- WARNING. If you eject the disk without dismounting it, you will
- probably corrupt the data on the disk and you will probably hang or
- crash Irix.
-
- You have to manually eject the disk. The eject command does not
- support M-O disks.
-
- ===================================================
- * How can I format an M-O cartridge under Irix 5.2?
- ---------------------------------------------------
-
- Use the program fx. As the superuser, type this command, substituting
- your drive's controller number and SCSI ID for (0,7).
-
- # fx -x "dksc(0,7)"
- fx version , Feb 14, 1994
- ...opening dksc(0,7,)
- ...controller test...OK
- Can't get drive geometry, assuming 64 sectors/track
- Can't get drive geometry, assuming 8 heads
- Unable to get device geometry, assuming default
- Scsi drive type == SONY SMO-F521-00 2.03
- fx: Warning - no sgilabel on disk
- warning: can't read sgilabel on disk
- creating new sgilabel
-
- ----- please choose one (? for help, .. to quit this menu)-----
- [exi]t [d]ebug/ [l]abel/ [a]uto
- [b]adblock/ [exe]rcise/ [r]epartition/ [f]ormat
- fx> format
-
- fx/format: Drive parameters to use in formatting = (current)
- * * * * * W A R N I N G * * * * *
- about to destroy data on disk dksc(0,7,)! ok? yes
- format will take approximately 15 minutes ...
- Can't get drive geometry, assuming 64 sectors/track
- Can't get drive geometry, assuming 8 heads
- Unable to get device geometry, assuming default
-
- ----- please choose one (? for help, .. to quit this menu)-----
- [exi]t [d]ebug/ [l]abel/ [a]uto
- [b]adblock/ [exe]rcise/ [r]epartition/ [f]ormat
- fx> exit
-
- label info has changed for .... write out changes? (yes) yes
-
- Formatting typically takes from ten to thirty minutes.
-
- ===================================================
- * How can I format an M-O cartridge under Irix 5.3?
- ---------------------------------------------------
-
- Use the program fx. As the superuser, type this command, substituting
- your drive's controller number and SCSI ID for (0,7).
-
- # fx -x -c "dksc(0,7)" FORMAT
-
- Formatting typically takes from ten to thirty minutes.
-
- =========================================================
- * How can I create an EFS filesystem on an M-O cartridge?
- ---------------------------------------------------------
-
- Use the program fx to create the volume header. As the superuser,
- type this command, substituting your drive's controller number and
- SCSI ID for (0,7).
-
- # fx "dksc(0,7)"
- fx version 5.3, Aug 15, 1994
- ...opening dksc(0,7,)
- ...controller test...OK
- Scsi drive type == SONY SMO-F521-00 2.03
-
- ----- please choose one (? for help, .. to quit this menu)-----
- [exi]t [d]ebug/ [l]abel/
- [b]adblock/ [exe]rcise/ [r]epartition/
- fx> repartition/option
-
- Warning: you will need to re-install all software and restor...
- from backups after changing the partition layout. Changing ...
- will cause all data on the drive to be lost. Be sure you ha...
- backed up if it contains any user data. Continue? y
-
- ----- please choose one (? for help, .. to quit this menu)-----
- [exi]t [d]ebug/ [l]abel/
- [b]adblock/ [exe]rcise/ [r]epartition/
- fx> exit
-
- Create the filesystem using this command, substituting your controller
- and SCSI ID for "s0d7".
-
- # mkfs /dev/rdsk/dks0d7s7
-
- If you want to create multiple partitions or otherwise customize the
- partition table, refer to the fx(1M) man page.
-
- =========================================================
- * Why does my Sony M-O get errors when I run /usr/bin/fx?
- ---------------------------------------------------------
-
- If you get errors during the controller test, you need new firmware.
- Upgrade the drive's firmware to at least revision 2.03.
-
- =================================================
- * How can I use an EFS filesystem on an M-O disk?
- -------------------------------------------------
-
- You have to manually mount it and dismount it. You must be careful
- never to eject the disk while the filesystem is mounted.
-
- As superuser, type this command to mount
-
- # /etc/mount /dev/dsk/dks0d7s7 /MO
-
- =================================================
- * How can I make a cartridge mount automatically?
- -------------------------------------------------
-
- If you want to leave a particular cartridge in the disk drive and have
- it mount every time you boot, put an entry into /etc/fstab. E.g., for
- an EFS filesystem,
-
- /dev/dsk/dks0d7s7 /MO efs rw 0 0
-
- For an HFS filesystem,
-
- /dev/rdsk/dks0d7vol /MO hfs rw 0 0
-
- See the fstab(4) manual page for more info.
-
- If you want to have disks automatically mount whenever they are
- inserted, you're out of luck. Mediad does that, and mediad doesn't
- recognize M-O's.
-
- ===============================================================
- * How can I mount an M-O cartridge without superuser privilege?
- ---------------------------------------------------------------
-
- There is a free program, mountMO, that allows you to do exactly that.
- It was written by Kent Landfield <kent@sparky.imd.sterling.com> and
- Alan Hewat <hewat@ill.fr>.
-
- >From the mountMO manual page:
-
- Mountmo allows a user who is not the superuser to mount a
- Magneto-Optic (MO) drive. The drive is mounted on the directory
- /modrive. The mount point /modrive must be a directory and not a
- symbolic link to a directory. The drive can be mounted as readonly
- using the -r option. The eject button is disabled until the disk
- is dismounted with the command "umountmo".
-
- On the Internet, you can get mountMO from this URL.
-
- ftp://viz.tamu.edu/pub/sgi/hardware/mountmo.c
-
- mountMO is also distributed on SGI's Developer's Toolkit CD-ROM.
-
-
- On Wed, Oct 19, "Jacky Romano" wrote:
-
- > A question came form a customer - Can we read/write Eraseable Optical
- > Disks in DOS format, so one can transfer data to/from PC's. Do you
- > have other ideas about media one can use to move ~500 MEG files to a
- > PC.
-
- -- David Youatt, dpy@sgi.com, 508/562-4800 x353
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