On Fri, 9 Jul 1999, Ben-Nes Michael wrote:
:Hi
:
:One of my computer - samba server (P166, 2 HD, Unknown motherboard, Scsi
:teac cdr55, btc cdrom20)
:got the following message and halt untill i reboot it :-(
:
:kernel: SysRq: unRaw saK Boot Off Sync Unmount showPc showTasks showMem
:loglevel0-8 tErm kIll killalL
:last message repeated 20 times
:kernel: SysRq: Emergency Sync
:kernel: Syncing device 03:02 ... OK
:kernel: Syncing device 03:04 ... OK
:kernel: Syncing device 03:03 ... OK
:kernel: Syncing device 16:01 ... OK
:kernel: Done.
:kernel: SysRq: unRaw saK Boot Off Sync Unmount showPc showTasks showMem
:loglevel0-8 tErm kIll killalL
:last message repeated 6 times
:
:Any ideas ?
:--------------------------
:Canaan Surfing Ltd.
:Internet Service Providers
:Ben-Nes Michael - Manager
:Tel: 972-6-6925757
:Fax: 972-6-6925858
:http://www.canaan.co.il
:--------------------------
this is output from "Magic SysRq" combination. you have to enable it when
compiling kernel, and you see this only in newer kernels, starting from
2.1.1xx . You can get the magic sysrq prompt by hitting M-SysRq (on my kb
it is located on PrintScrn key).
It seems like you (someone) hit M-SysRq-S. This does something like L1-A ;
sync on suns - writes kernel image (core) on disk, and virtually halts the
kernel (on sun it will continue to firmaware state. PC do not have this
state, so the hack can not be perfect).
I have no idea why this could happen, but this is the output of the
process described above. If you are concened that somebody can gain access
to a server and intentionaly crash it, you can disable the option in
kernel configuration.
Hope this helps.
omer
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