Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watmath!clyde!rutgers!sri-spam!ames!sdcsvax!ucsdhub!esosun!seismo!uunet!munnari!acp!sns From: sns@acp.UUCP Newsgroups: comp.sys.amiga Subject: Re: hard disk flaw problems Message-ID: <412@acp.OZ> Date: Wed, 2-Dec-87 20:48:46 EST Article-I.D.: acp.412 Posted: Wed Dec 2 20:48:46 1987 Date-Received: Wed, 9-Dec-87 00:46:17 EST References: <1884@cadovax.UUCP> <2605@masscomp.UUCP> <1888@cadovax.UUCP> <2859@cbmvax.UUCP> Organization: Australian Computer Products, Perth, Australia Lines: 28 Keywords: hard disk format flaws Summary: Max partition size = 26*127*32 blocks In article <2859@cbmvax.UUCP>, grr@cbmvax.UUCP (George Robbins) writes: > > The current filesystem limitations are 56 MB per >>>> PARTITION <<<< Actually, the maximum partition size is :- 26 bitmap block ptrs * 127 long-words per bitmap block * 32 bits per bitmap block ------ 105664 blocks/partition = about 52Mb (51.6Mb) My company has developed a hard disk subsystem for the Amiga using SCSI. The driver scans the SCSI bus to look for active hard disks. It then constructs device tables for each hard disk, and for large drives (e.g. over 52Mb) it breaks the drive down into a number of logic partitions. The nice thing about doing it this way is the end-user can ignore the whole problem of device & partition sizes. For example, if a 100Mb drive and a 20Mb drive is connected (as on my work Amiga-2000), then three logical partitions are created. This seems to be a workable solution to the partition & mountlist problems. sssss n n sssss Stuart Nixon (Australian Computer Products) s nn n s Phone: +61 9 322 6497 sssss n n n sssss Usenet: ...{decvax,hplabs}!munnari!acp.oz!sns s n nn s ARPAnet: sns%acp.oz@seismo.css.gov sssss n n sssss ACSnet: sns@acp.oz