Download: vold_pcfs.20000727.tar.gz
Solaris2では FAT なZipやMOをvoldでマウントすることはできません (できたように見えた場合は中身が壊れる) が、それをむりやり可能にするための方法です。

README

========================================================================== Wrappers for mounting pcfs(7FS) bigdisks via vold(1M) on SPARC Solaris 2.6 ========================================================================== WHAT IS THIS? ============= You can mount DOS filesystem ZIPs and MOs via vold(1M). INSTALLATION ============ Before you install this package, go up to a point that you can format, mount, read and write a ufs (mount_ufs(1M)) ZIP or MOs via vold. Be sure the hardware/setup bugs are eliminated. Three methods are provided. The Recommended is Method 3, but for those who want minimal quirks installed, Method 1 and 2 is here. DO NOT install all of them; only one method should be installed. Method 1: Only wrap /usr/lib/fs/pcfs/mount This wrapper mounts pcfs with ":c" appended, then deletes ":c" from /etc/mnttab after the mount succeeded. Installation: Use "make install-method1". Files affected: /usr/lib/fs/pcfs/mount Pros: Only one file is patched. Cons: /etc/mnttab is lacking ":c", so it's hard to know afterwards whether it is mounted with or without ":c". Method 2: Wrap /usr/lib/fs/pcfs/mount and /usr/sbin/rmmount The pcfs/mount wrapper just appends ":c" to the device file string. The rmmount wrapper deletes ":c" from /etc/mnttab and passes on if it was an eject request. Installation: Use "make install-method2". Files affected: /usr/lib/fs/pcfs/mount /usr/sbin/rmmount Pros: ":c" remains on /etc/mnttab, so you know it :) You can have aliases other than "rmscsi%d" in vold.conf and have no trouble. Cons: Two commands are wrapped. Ugly. Method3: Create a new filesystem identifier "fdiskfs" - /usr/lib/fs/pcfs/ident_pcfs.so only recognizes superfloppy formatted disk, and the logic is rather loose. - pcfs(7FS) can only mount FAT12 floppy and FAT16 FDISK. This difference may cause - FDISK disks not mounted even if it could, or - mount a FAT16 superfloppy in FAT12 mode and corrupt it. So, install a new filesystem identifier "ident_fdiskfs.so" and enable this in the rmmount.conf(4) "ident" chain. Installation: Use "make install-method3". Files affected: /usr/lib/fs/fdiskfs/ident_fdiskfs.so.1 /usr/lib/fs/fdiskfs/mount /usr/lib/fs/pcfs/ident_pcfs.so.1 /usr/sbin/rmmount Then add following to /etc/rmmount.conf before pcfs line: ident fdiskfs ident_fdiskfs.so rmscsi and modify the last line of the /etc/vold.conf to unsafe ufs hsfs pcfs fdiskfs Finally, restart vold. Pros: Additional to Method2, you can mount FDISK disks without any kludge to make it look like a superfloppy format. FAT16 superfloppys (which cannot be mounted) are properly rejected to prevent corruption. (If you want to mount the superfloppys, fake a FDISK info on it by "fdiskize" utility) These configuration are the best for the novice user. Cons: /usr is rather polluted. Some Sun official patches may also replace the files affected by this package. When applying official patches, it is strongly recommended to first uninstall this package by "make uninstall", then apply the patch and then reinstall. (At the date of writing no conflicts with Recommended patches) UNINSTALL ========= "make uninstall" . If you're switching between methods, uninstall them first. PLATFORM SUPPORTED ================== Yes, further success report is greatly appreciated. Dunno whether this works on x86. UltraSPARC-1/170 (Sbus,SCSI) + Solaris 2.6 + SCSI ZIP100 + SCSI 230MB MO(Fujitsu MCB3023SS) 640MB MOs are NOT supported. (540MB probably works, but not confirmed) WHAT THIS DOES ============== Not only x86, but SPARC Solaris also could mount FDISK partitioned bigdisks commonly seen on ZIP and Magneto-Optical(MO). But the device file string needs ":c" appended, like mount -F pcfs /vol/dev/dsk/c0t4d0/no_name:c /rmscsi/no_name which vold(1M) (actually rmmount(1M)) does not do. Even by only minor setup, which means just enabling the "dev_rmscsi.so" line in /etc/vold.conf, vold(1M) does mount some MOs by insertion. But it lacks ":c". This makes pcfs(7FS) assume that the filesystem is FAT12(!), and CORRUPTS IT ON THE VERY FIRST WRITE. (This won't be a problem on filesystems below 16MB, such as floppys) So I made a wrapper around /usr/lib/fs/pcfs/mount to forcibly add ":c" for rmscsi devices, and then pass it to original /usr/lib/fs/pcfs/mount. Just adding ":c" causes another problem. ":c"-suffixed path is recorded in /etc/mnttab. And rmmount(1M) seems to scan and stat(2) each device spec in /etc/mnttab on eject. As device file like "/vol/dev/dsk/c0t4d0/no_name:c" usually doesn't exist, unmounting/ejecting fails. To get around this, the ":c" suffix should be deleted from /etc/mnttab line somewhere before the eject. (This is ugly but without the rmmount source code we can't fix it) DISK FORMATS ============ Magneto-Opticals comes in two formats; FDISK format and Superfloppy format. ZIPs are always FDISK. FDISK resembles IBM-PC harddisk format. It can have up to four primary partitions on a single medium. (though pcfs(7FS) seems to use the only first one) MOs formatted by WindowsNT is in this form. ZIPs are always FDISK. Superfloppy does not have a partition; the whole disk is a whole disk, which corresponds to a single partition image of a harddisk. (In FreeBSD terms the whole disk is a slice image.) MOs used by Windows95 comes in this format. pcfs(7FS) seems to understand only FDISK format when you need FAT16. But the filesystem resolver, ident_pcfs.so, invoked by rmmount(1M), seems to only detect superfloppy, so vold(1M) does not always mount the media. (To check for yourself, fstyp(1M) is something close, but actually /usr/lib/fs/pcfs/ident_pcfs.so.1 is used; they use different logic) So, for automatic mount, the disk should be formatted in superfloppy (to make ident_pcfs.so happy) with a fake FDISK partition information (to mount it in FAT16) and a hooked /usr/lib/fs/pcfs/mount to add ":c" to the device path (to mount it in FAT16). This is Method 1,2. Another way is to separate FDISK and superfloppy detection/mount; this is Method 3, which you don't need any superfloppy things on the disk. For mounting superfloppy disks, you still need fake FDISK information as this is the restriction of the pcfs(7FS). There is an `fdiskize' tool included to create it. You can't use fdformat(1) for formatting in pcfs. You may need mformat(1) included in mtools distribution. In mtools language, superfloppy will mean a config line without a "partition=" clause. mformat(1) produces a `fake' FDISK partition info even if without "partition=", so the disk formatted by mformat(1) could be detected & mounted by vold(1M) after installation. Occasionally a pcfs(7FS) disk is erroneously mounted as ufs, especially when the disk is previously formatted in ufs. Before formatting, something like dd if=/dev/zero of=/vol/dev/aliases/rmscsi0 bs=18k count=10 (or just cp /kernel/genunix /vol/dev/aliases/rmscsi0) to get rid of the previous filesystem trace, is recommended. -- かべ＠sra-tohoku.co.jp $Id: README,v 1.7 2000-07-27 01:59:21+09 kabe Exp $