From mboxrd@z Thu Jan 1 00:00:00 1970 From: John DeGood To: 9fans@cse.psu.edu Message-id: <014301c226f8$e4e2aa00$1b02a8c0@arnysm01.nj.comcast.net> MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-transfer-encoding: 7BIT References: Subject: [9fans] Plan 9 incompatible with EZ-BIOS/EZ-Drive? Date: Mon, 8 Jul 2002 23:29:54 -0400 Topicbox-Message-UUID: c612c71e-eaca-11e9-9e20-41e7f4b1d025 1) I used Win98SE to create a bootable 512 MB FAT16 partition. 2) I installed Plan 9 4th edition, using Plan 9 fdisk to create a PLAN9 partition. Here is the output of fdisk: term% disk/fdisk /dev/sdC0/data cylinder = 2064384 bytes * p1 0 248 (248 cylinders, 488.25 MB) type 85 p2 248 496 (248 cylinders, 488.25 MB) PLAN9 empty 496 1023 (527 cylinders, 1.01 GB) Note that the reported size of the FAT16 partition is wrong! 3) If I run Windows fdisk after the Plan 9 installation, the PLAN9 partition does not appear. If I add a new partition using Windows fdisk it creates it right after the FAT16 partition, ignoring the PLAN9 partition. 4) I suspect the Plan 9 partition overlaps the FAT16 partition. Discussion: This system has an old Intel motherboard whose BIOS screws up the geometry for "large" IDE drives (like this 2.1 GB AC22100), so as a workaround the Western Digital-furnished EZ-BIOS (aka EZ-Drive) allows Windows to boot from this drive. "type 85" (0x55) is the partition ID for EZ-BIOS. From : 55 EZ-Drive EZ-Drive is another disk manager (by MicroHouse, 1992). Linux kernel versions older than 1.3.29 do not coexist with EZD. Hypothesis: It appears that Plan 9 4th Edition does not (yet) coexist with EZD? John