cjp@SSESCO.com (Chuck Purcell) (01/03/91)
I have been asked via e-mail to report on my disk installation experiences.
So:
# Startup experiences cjpurcell 02Jan90 NeXT slab - connect external disk.
# Procure scsi-2 to Centronics-50 cable and a shoebox with empty disk.
# I use a fresh factory-formatted disk complete with resident cricket 8-) .
# first power down, connect the disk and restart, avoid the invitation for
# disk initialization at this point!
# sign on as root, then execute:
# scsimodes /dev/rsd1a to obtain:
SCSI information for /dev/rsd1a
Drive type: CDC 94191-15
512 bytes per sector
54 sectors per track
15 tracks per cylinder
1632 cylinders per volume (including spare cylinders)
1 spare sector per track
30 alternate tracks per volume
1295849 usable sectors on volume
Use the scsimodes information(and a lot of courage) to form the:
# /etc/disktab entry for:
# Seagate Wren VI 660 Megabytes formatted w/ 512 byte blocks - 4 partitions
ST4766N|CDC 94191-15|Wren VI Seagate 766 MB w/512 byte sectors in 4 parts:\
:ty=fixed_rw_scsi:nc#1599:nt#15:ns#27:ss#1024:rm#3600:\
:fp#160:bp#0:ng#0:gs#0:ga#0:ao#0:\
:os=sdmach:z0#32:z1#96:ro=a:\
:pa#0:sa#259200:ba#8192:fa#1024:ca#16:da#4096:ra#10:oa=time:\
:ia:ta=4.3BSD:ma=root:\
:pb#259200:sb#129600:bb#8192:fb#1024:cb#16:db#4096:rb#10:ob=time:\
:ib:tb=4.3BSD:\
:pc#388800:sc#129600:bc#8192:fc#1024:cc#16:dc#4096:rc#10:oc=time:\
:ic:tc=4.3BSD:\
:pd#518400:sd#129195:bd#8192:fd#1024:cd#16:dd#4096:rd#10:od=time:\
:id:td=4.3BSD:
# total = 647595 - 1024 byte blocks == 1295190 sectors == 663137280 bytes. #
# /etc/fstab entry for WrenVI configuration:
# DO NOT DELETE THIS FILE, IT IS REQUIRED FOR BOOTING
# cjp-02Jan91 for WrenVI as an external, non-boot, disk drive.
# This file contains information used to mount local hard disks.
# Consult your system administration and networking manual
# for information on adding local disks. Information on the format
# of entries in this file can also be found in the fstab man page,
# search for fstab in Digital Librarian.
#
/dev/sd0a / 4.3 rw,noquota,noauto 0 1
/dev/sd1a /home 4.3 rw,noquota 1 2
/dev/sd1b /user 4.3 rw,noquota 1 3
/dev/sd1c /work 4.3 rw,noquota 1 4
/dev/sd1d /next 4.3 rw,noquota 1 5
# Using the disktab entry above; do the disk drive installation program:
localhost# disk -i -t ST4766N /dev/rsd1a
disk name: ST4766N
disk type: fixed_rw_scsi
writing disk label
creating new filesystem on /dev/rsd1a
/usr/etc/newfs -n -v /dev/rsd1a
/dev/rsd1a: 259200 sectors in 640 cylinders of 15 tracks, 27 sectors
265.4Mb in 40 cyl groups (16 c/g, 6.64Mb/g, 1600 i/g)
super-block backups (for fsck -b#) at:
16, 6528, 13040, 19552, 26064, 32576, 39088, 45600, 52112, 58624,
65136, 71648, 78160, 84672, 91184, 97696, 103696, 110208, 116720, 123232,
129744, 136256, 142768, 149280, 155792, 162304, 168816, 175328, 181840,
188352, 194864, 201376, 207376, 213888, 220400, 226912, 233424,
239936, 246448, 252960,
/etc/mkfs /dev/rsd1a 259200 27 15 8192 1024 16 10 60 4096 t
creating new filesystem on /dev/rsd1b
/usr/etc/newfs -n -v /dev/rsd1b
/dev/rsd1b: 129600 sectors in 320 cylinders of 15 tracks, 27 sectors
132.7Mb in 20 cyl groups (16 c/g, 6.64Mb/g, 1600 i/g)
super-block backups (for fsck -b#) at:
16, 6528, 13040, 19552, 26064, 32576, 39088, 45600, 52112, 58624,
65136, 71648, 78160, 84672, 91184, 97696, 103696, 110208, 116720, 123232,
/etc/mkfs /dev/rsd1b 129600 27 15 8192 1024 16 10 60 4096 t
creating new filesystem on /dev/rsd1c
/usr/etc/newfs -n -v /dev/rsd1c
/dev/rsd1c: 129600 sectors in 320 cylinders of 15 tracks, 27 sectors
132.7Mb in 20 cyl groups (16 c/g, 6.64Mb/g, 1600 i/g)
super-block backups (for fsck -b#) at:
16, 6528, 13040, 19552, 26064, 32576, 39088, 45600, 52112, 58624,
65136, 71648, 78160, 84672, 91184, 97696, 103696, 110208, 116720, 123232,
/etc/mkfs /dev/rsd1c 129600 27 15 8192 1024 16 10 60 4096 t
creating new filesystem on /dev/rsd1d
/usr/etc/newfs -n -v /dev/rsd1d
/dev/rsd1d: 129600 sectors in 319 cylinders of 15 tracks, 27 sectors
132.3Mb in 20 cyl groups (16 c/g, 6.64Mb/g, 1600 i/g)
super-block backups (for fsck -b#) at:
16, 6528, 13040, 19552, 26064, 32576, 39088, 45600, 52112, 58624,
65136, 71648, 78160, 84672, 91184, 97696, 103696, 110208, 116720, 123232,
/etc/mkfs /dev/rsd1d 129195 27 15 8192 1024 16 10 60 4096 t
initialization complete
.......A total of 663.1 megabytes are installed(663.475 mbytes promised).
# then use the fstab entry above:
# mount -a
You may wonder why I partition into sizes mostly less than 150 megabytes......
I have the 150 Mbyte tape unit for backup purposes. If I restrict the size of
several of the "folders" to less than 150 Megabytes, it is then easier to do
backups as owner-operator and chief hacker. The resultant disk space:
Filesystem kbytes used avail capacity Mounted on
/dev/sd0a 98442 67909 25610 73% /
/dev/sd1a 250543 51511 173977 23% /home
/dev/sd1b 125263 12 112724 00% /user
/dev/sd1c 125263 11 112725 00% /work
/dev/sd1d 124858 11 112361 00% /next
"Folder" /home now contains a dump/restore copy of "folder" /
This includes everything in root except the 16+megabytes of "folder" /var .
Cheers!Chas