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тАО05-05-2005 06:30 AM
тАО05-05-2005 06:30 AM
Get more RAM File System Space (HPUX Recovery Document)
The procedure to increase the RAM file-system space on "Chapter 4 - System Recovery" PDF is wrong or at least does not work.
I quote:
loadfile mkfs tar chroot
mknod /dev/ram b 9 0x180000
mknod /dev/rram c 9 0x180000
mkfs /dev/rram
the make FS cannot open the device /dev/rram
the devices are:
brw-r--r-- 0x18000 /dev/ram
crw-r--r-- 0x18000 /dev/rram
Even chaning them to 666 didn't help.
Does someone know a possible work-around to solve this issue?
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тАО05-05-2005 06:36 AM
тАО05-05-2005 06:36 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=227456
Pete
Pete
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тАО05-05-2005 06:48 AM
тАО05-05-2005 06:48 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО05-05-2005 06:49 AM
тАО05-05-2005 06:49 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
2) # set up the device files and mount the ramdisk:
2) # create the device files with major 9 (both b and c),
2) # and minor 0xVSSSSS, where "V" is the volume num,
2) # and "SSSSS" is the number of sectors in the ram
2) # disk, each sector is 256 bytes.
2) mknod /dev/rram1 c 9 0x101000
2) mknod /dev/ram1 b 9 0x101000 # that's 1MB
2) mkfs -F hfs /dev/rram1 # no point in VxFS here
2) mount /dev/ram1 /ramdisk
As everybody (especially Bill :-) pointed out:
THIS IS UNSUPPORTED, dangerous, and such...
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тАО05-05-2005 06:50 AM
тАО05-05-2005 06:50 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
but unfortunately didn't help :(
This system is HP-UX and I'm at present moment with a reduced kernel (boot from CDROM) trying to fix it... but I need to be able to increase the ramdisk to load the commands to repair the LVM and mount the root-FS.
HP documentation about this (how to increase the ram disk) is wrong or does not work :(
So I'm "stucked" with a system unable to boot from the primary disks :(
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тАО05-05-2005 06:55 AM
тАО05-05-2005 06:55 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
Check this doc and the warning!
Document description: The use of virtual ramdisc (as a file in memory) on HP-UX
Document id: KBAN00000674
*** DO NOT USE RAMDISC - IT IS NEITHER BENEFICIAL, DOCUMENTED, NOR SUPPORTED ***
US
http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062684407
Europe
http://www4.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062684407
Regards,
Robert-Jan
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тАО05-05-2005 07:00 AM
тАО05-05-2005 07:00 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
http://www4.itrc.hp.com/service/iv/docDisplay.do?docId=prodITRC/DE_SW_UX_swrec_EN_01_E/SystemRecovery.pdf
The mkfs couldn't read the /dev/rram to create the FS however both devices were there and accessible
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тАО05-05-2005 07:04 AM
тАО05-05-2005 07:04 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
mkfs -F hfs /dev/ram
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тАО05-05-2005 07:11 AM
тАО05-05-2005 07:11 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
mkfs -F hfs /dev/ram
----------------------------------
It assumed hfs by default... however returned as cannot open the device.
Here is the example (following the procedure)
# loadfile mkfs tar chroot
# pwd
/
# mknod /dev/ram b 9 0x180000
# mknod /dev/rram c 9 0x180000
# mkfs /dev/rram
mkfs (hfs): Cannot open /dev/rram
mkfs (hfs): No such device or address
# ll /dev/ram /dev/rram
brw-r--r-- 1 root sys 9 0x180000 May 5 15:07 /dev/ram
crw-r--r-- 1 root sys 9 0x180000 May 5 15:07 /dev/rram
even with mkfs -F hfs
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тАО05-05-2005 07:19 AM
тАО05-05-2005 07:19 AM
Re: Get more RAM File System Space (HPUX Recovery Document)
Does it give something?? Is driver "ram" in kernel??