DOCUMENT ID: 0919-03 SYNOPSIS: Interactive Unix 4.0 Frequently asked Questions and Answers OS: Interactive PLATFORM: Intel OS VERSION: 4.0 TECH AREA: OS PRODUCT: Utilities, IUS KEYWORDS: Frequently asked Questions FAQ features DESCRIPTION: Interactive Unix 4.0 Frequently asked Questions and Answers SOLUTION: 1. Features of the 4.0 Interactive Unix product The following is a partial list of the major new features: -Long Filenames up to 512 characters are supported. -The standard "S5" filesystem has been updated to support symbolic links. -The ability to access more than 16MB on an ISA machine. -The Operating system is now distributed on a quarter inch cartridge, 150 MB (QIC 150) tape. -A new ASY driver that provides hardware flow control support. 2. To successfully install and use the Interactive Unix Operating System you must have the following hardware components: -386, 486 or Pentium ISA , EISA or Micro channel architecture platform. -4 megabytes of 32-bit Random Access Memory is enough to install, but at least 8 megabytes is recommended. -One fixed disk of at least 40 MB capacity is required. A 40-80 MB or larger fixed disk is strongly recommended. -A hard disk controller or SCSI host adapter supported by the Interactive Unix System is required. -A high-density drive that supports a 3 1/2 inch drive is required. The system will boot from 5 1/4 media, but the complete distribution is available on only 3 1/2 inch diskettes or tape. -A monochrome, Hercules, CGA, VGA, or EGA display adapter and monitor, or other display that correctly emulates one or more of those video standards, is required. 3. The supported tapes drives for the 4.0 tape installation are: -Any SCSI 150mb tape drive that will run off an Adaptec, DPT, or Future Domain SCSI controllers. This includes Archive SCSI model 2150s, Mountain File Safe 7250SA, Sanyo model CP-150se, and the Wangtek 5150 ES. 4. What to do when after the installation, the kernel will not boot and booting off of OLD.unix doesn't work. This problem can be solved by mounting the fix disk partition on the boot disk and copying the kernel found on the boot/install diskette to your fixed disk partition. Insert the boot/install diskette into the diskette drive and press reset. After the "Booting the Interactive Unix System" message appears, press the spacebar. Type maint and press return. At the shell prompt type /etc/fsck /dev/dsk/0s1. Answer YES to the questions asked by fsck, but be aware this could remove some files. Mount the fixed disk by typing mount /dev/dsk/0s1 /mnt. To copy the kernel from the floppy disk type cp /unix/mnt/unix. Unmount the fix disk by typing imount /mnt. Remove the boot/install diskette and type shutdown. Press any key to reboot when prompted. When the system comes back up, log in as root and reinstall any previous installed drivers using the kconfig command. 5. If your installation failed, below is a procedure that will allow you to recover you system. It is possible that when something goes wrong while updating a 3.0.1 system to 4.0, the original system is left in a non-bootable state. The most likely scenario's are the ones where the update is done from tape and a) The update is interrupted because the tape cannot be found or appears to be too slow. b) While updating the disk gets full and the system hangs. What has happened is that important system files, most of them in /etc, such as partitions, have been moved away and not restored when the process was interrupted or stopped. The list of files include /etc/partitions and /etc/fstab which are quite essential to boot or to mount the original filesystems. To bring your system back up: Boot from the Boot floppy When the message: Booting the INTERACTIVE UNIX System appears, press the space bar and then type in /maint when asked what to boot from It will bring up the system in maintenance mode running off a RAM disk Now mount the hard disk (it will probably fail, so do fsck first): fsck /dev/dsk/0s1 mount /dev/dsk/0s1 /mnt Now copy all the files back: cp /mnt/etc/UGpartitions /mnt/etc/partitions You will find all the files back, with UG in the beginning of the name umount /mnt shutdown and reboot from the hard disk. Your system should come back up and you can restart the 4.0 upgrade. DATE APPROVED: 08/07/97
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