lenoirjw@INGR.COM (Billy Lenoir) (06/05/90)
I am having a little problem with my installation of A/UX. I have it installed
on a 3rd party hard drive with the X11R4 installed. Anytime I run Xwindows
my MacOS partition is wiped out. I suspect that A/UX is using it for swap
space!?! The swap partition is set up as:
DPM Index: 5
Name: "Swap", Type: "Apple_UNIX_SVR2"
Physical: 34068 @ 604941, Logical: 34068 @ 0
Status:
valid alloc in_use not boot
read write
Swap File System (3) (critical)
Cluster: 0 Type: SFS Inode: 1
Made: [0] Wed Dec 31 18:00:00 1969
Mount: [0] Wed Dec 31 18:00:00 1969
Umount: [0] Wed Dec 31 18:00:00 1969
No AltBlk map
The only information that I can find on which partition is actually being
used is from "swap -l":
path dev swaplo blocks free
/dev/dsk/c4d0s128,1 0 28672 28672
This doesn't appear to be the correct size for the Swap partition or the MacOS
partition, and I don't know what the device name is for. Is there anything
that I'm missing? I'm sure I don't need to tell you what a pain it is to
lose the HD every time I run X11R4 (which is never, now)
--
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Signature Almost uucp : ...!uunet!ingr!b10!lenoir!lenoirjw
Complete Internet : lenoirjw@INGR.COMkr@asacsg.mh.nl (Koos Remigius) (06/06/90)
In article <167@cis9.INGR.COM>, lenoirjw@INGR.COM (Billy Lenoir) writes: > I am having a little problem with my installation of A/UX. I have it installed > > DPM Index: 5 > Name: "Swap", Type: "Apple_UNIX_SVR2" > Physical: 34068 @ 604941, Logical: 34068 @ 0 > Status: > valid alloc in_use not boot > read write > Swap File System (3) (critical) > > The only information that I can find on which partition is actually being > used is from "swap -l": > > path dev swaplo blocks free > /dev/dsk/c4d0s128,1 0 28672 28672 > It seems your kernel parameter SWAPCNT is less than your swappartition on your drive. To set the parameter do as follows: Go to Single User. Enter the following lines: kconfig -n /unix SWAPCNT=34068 <Control-D> sync sync sync reboot This will reboot the kernel with the correct SWAPCNT size. Hope this will solve your problem. regards, Koos Remigius -- Koos Remigius kr@mh.nl via internet backbones Asac Nederland B.V uucp: ..!{uunet,hp4nl}!mh.nl!kr Coencoop 7, 2741 PG Waddinxveen, The Netherlands -------------------- "Still crazy after all this years" ---------------------
liam@cs.qmw.ac.uk (William Roberts) (06/06/90)
In <167@cis9.INGR.COM> lenoirjw@INGR.COM (Billy Lenoir) writes: >I am having a little problem with my installation of A/UX. I have it installed >on a 3rd party hard drive with the X11R4 installed. Anytime I run Xwindows >my MacOS partition is wiped out. I suspect that A/UX is using it for swap >space!?! The swap partition is set up as: >DPM Index: 5 >Name: "Swap", Type: "Apple_UNIX_SVR2" >Physical: 34068 @ 604941, Logical: 34068 @ 0 >Status: > valid alloc in_use not boot > read write >Swap File System (3) (critical) >Cluster: 0 Type: SFS Inode: 1 >Made: [0] Wed Dec 31 18:00:00 1969 >Mount: [0] Wed Dec 31 18:00:00 1969 >Umount: [0] Wed Dec 31 18:00:00 1969 >No AltBlk map >The only information that I can find on which partition is actually being >used is from "swap -l": >path dev swaplo blocks free >/dev/dsk/c4d0s128,1 0 28672 28672 >This doesn't appear to be the correct size for the Swap partition or the MacOS >partition, and I don't know what the device name is for. Is there anything >that I'm missing? I'm sure I don't need to tell you what a pain it is to >lose the HD every time I run X11R4 (which is never, now) The number 28672 is the size wired into the Kernel to tell it how big the swap partition is - since 34068 > 28672 you aren't running off the end (the SCSI driver prevents you from doing that anyway, so swap isn't the reason why you are trashing your Mac partition). The size of swap is set using kconfig on /unix (and /newunix if you want it to persist across autoconfiguration) - check the manual page for details. This little irritation is fixed in A/UX 2.0 where the kernel manages to read the partition map to find out the size of swap... It would be helpful to see the complete output of dp, and the output of kconfig -va /unix; I'll read the entrails if you care to mail them to me (summary of answers to the net of course). -- William Roberts ARPA: liam@cs.qmw.ac.uk Queen Mary & Westfield College UUCP: liam@qmw-cs.UUCP Mile End Road AppleLink: UK0087 LONDON, E1 4NS, UK Tel: 071-975 5250 (Fax: 081-980 6533)
name@portiaStanford.EDU (tony cooper) (06/07/90)
In article <2337@sequent.cs.qmw.ac.uk>, liam@cs.qmw.ac.uk (William Roberts) writes: > In <167@cis9.INGR.COM> lenoirjw@INGR.COM (Billy Lenoir) writes: > > >I am having a little problem with my installation of A/UX. I have it installed > >on a 3rd party hard drive with the X11R4 installed. Anytime I run Xwindows > >my MacOS partition is wiped out. I suspect that A/UX is using it for swap > >space!?! The swap partition is set up as: > > It would be helpful to see the complete output of dp, and the > output of kconfig -va /unix; I'll read the entrails if you care Yes, we need more information on this one. What do you mean by "wiped out"? Is the partition still there but the data in it is trash? Or do you have to repartition the drive again? It seems doubtful that swap space is overflowing since X Windows has to be really pushed hard to use more than 15 thousand blocks (I have seven windows and 5 X applications plus 3 xterms right now and using 8000 blocks). It seems doubtful that A/UX is deliberately doing anything to the MacOS partitions since it ignores them completely (under A/UX 1.1 that is). And does the wiping out happen everytime or just sometimes? Cheers, Tony Cooper tony@popserver.stanford.edu
liam@cs.qmw.ac.uk (William Roberts) (06/08/90)
In <1990Jun7.030853.22479@portia.Stanford.EDU> name@portiaStanford.EDU (tony cooper) writes: >It seems doubtful that swap space is overflowing ... I repeat, it is DEFINITELY NOT SWAP that is overwriting other parts of the disk unless the partitions defined in the partition map actually overlap. The pname'ing of a disk partition (which happens automatically for swap) is effectively initialising a translation function from sectors requested of that particular A/UX device (in this case 24,1) and physical sector requests over the SCSI bus. There is range checking, and silly values are ignored: for example dd if=/dev/dsk/c0d0s1 of=/dev/null will stop after the number of blocks defined to be in the swap partition according to the partition map, as will the (probably lethal) dd if=/dev/dsk/c0d0s0 of=/dev/dsk/c0d0s1 [[ Remember children - don't try this at home* ]] The value of SWAPCNT that is kconfig'd into the kernel does not matter: if it is too small then not all of swap will be used, if it is too big then when you exceed the size that the partition map allows you will get "process killed due to i/o error in swap" messages from the kernel. ------------- * Or if you do, remember to do it single-user and wear a condom. -- William Roberts ARPA: liam@cs.qmw.ac.uk Queen Mary & Westfield College UUCP: liam@qmw-cs.UUCP Mile End Road AppleLink: UK0087 LONDON, E1 4NS, UK Tel: 071-975 5250 (Fax: 081-980 6533)