Everhart, Glenn From: rdw@threel-nospam.co.uk Sent: Thursday, June 25, 1998 6:08 AM To: Info-VAX@Mvb.Saic.Com Subject: Re: VMS's file systems [With apologies for the repost] > Ok, let's see if I have this right (VMS=OpenVMS, right?): Yup, a pure product of Stealth marketing. Nothing to do with the port to Alpha. Even less of a change than the 5 byte change which gave birth to microVMS... >VMS's native file system is: ODS-2 Yup as in the only one it can boot from. >VMS can read and write the following file systems: (DEC) ODS-2, ODS-1 Plus - ASNI formatted Mag tapes which is almost a file system to VMS - The ODS-2 Spinoffs. There was one which was aimed at CD's (Andy?) and there was the X.3 to 39.39 change which happened about 4.0 time... - The lamented (by those who lost 2 years of our lives doing it) Spiralog - ODS-5. This is an ODS-2 look alike with some new attributes, some cleaned up handling and much longer names, lower case and Unicode support. When we designed it we made it as close to ODS-2 as possible (upgrade is nearline with no copying) >VMS can read the following file systems: (optical) ISO 9660 and Hi-Sierra >VMS can read and write the following file systems through third party or >optional software: (MS-DOS) FAT, (network) NFS Plus (I Think) there is a freeware SMB reader which immediately gives access to a whole lot more stuff The problem is that just because you can read the filesystem you may not be able to make sense of the contents (as anyone who has tried to read text files on a PC fro Unix and vice-versa knows). VMS is more complicated because it has proper record management as well, a large chunk of the slowdown in PATHWORKS comes from the interpreting of the records as they go by... Another issue comes from the Cluster model. Shared everything gets really deep into the filesystem semantics if you want to do read *and* write (a reason why not many shared everything filesystems are about) and you cannot simply make a recogniser for a random filesystem run in a VMSCluster. Any recognisers which are around tend to be single node. >VMS can NOT read or write the following file systems: (Macintosh) HFS+, HFS, >MFS, (Windows) NTFS, FAT32, VFAT, (UNIX) UFS, sysvfs, Xenix, UMSDOS, (optical) >CD-i, Video CD, Enhanced CD, Kodak PhotoDisk, Audio CD, DVD, (LINUX) ext2fs, >extfs, Minix, (BSD) BFFS, (OS/2) HPFS-2, HPFS, (Amiga) FFS, OFS, AFS, MuFS, >DCFS, SFS, (SGI) XFS, EFS, (BeOS) befs, (network) coda, SMB, (HP-UX) jfs, hfs, >(Acorn) adfs, (other) xiafs, TVFS, CPM, 1541, PFS2, QL pass. But as I mentioned above I think that there is a SMB listener out there and aren't Kodak CD's just an extension of IS9660? >What file systems can VMS format? ODS-1 ODS-2, ODS-2.1 ODS-5 and (at one time) Spiralog >What is the native file system of Digital UNIX? I think it's a UFS spin off, but there is also the proprietary AdvFS, I think you can boot from AdvFS as well... hth Rod