[SLUG] grub error 15
After doing a routine reboot I get grub error 15 on Ubuntu 8.10 There are 3 drives on the system of which only one is bootable. The UUID's on fstab and menu.lst match. The bootable drive/partition is sdc3 and in the menu.lst it says (hd 0,2) When I enter the BIOS I am only getting one option for booting into a hard-drive, although I recollect that previously I had to select which hard drive. The BIOS does recognise all three hard drives as being present. I am able to mount the bootable drive from a live CD and the data appears to be OK. Any suggestions what has gone amiss? -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] grub error 15
On 26/01/10 23:25, da...@kenpro.com.au wrote: After doing a routine reboot I get grub error 15 on Ubuntu 8.10 Does this error occur before or after the GRUB menu appears? i.e. do you get presented with a menu to select which kernel at all, or does it bomb out before it gets to that stage? When I enter the BIOS I am only getting one option for booting into a hard-drive, although I recollect that previously I had to select which hard drive. The BIOS does recognise all three hard drives as being present. I am able to mount the bootable drive from a live CD and the data appears to be OK. Any suggestions what has gone amiss? It may well be that the GRUB MBR is simply looking at the wrong drive for the menu.lst file. In which case, re-running grub-install would be my first suggestion as a fix. Jeremy. signature.asc Description: OpenPGP digital signature -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Wireless Broadband?
Ben Sand wrote: I'm pretty sure this is the model I use now: http://maxon.com.au/shop/product_info.php?cPath=21products_id=47 expensive from the manufacturer, but should work on Linux, you can check with them, but they are somewhat Linux aware: $495 This is a rather elegant solution - I have been using ever since the I-burst network was shutdown (December 2008). Virgin Branded/Optus network Modem (was the best capped/shaped deal at the time) http://www.tomw.net.au/blog/2008/12/virgin-mobile-broadband.html 3 Router: with 1 ethernet port and wifi. I had to replace the router after accidentally plugging my kogan power supply into it. The price went upto $160) http://www.tomw.net.au/blog/2008/12/huawei-d100-3g-router.html By far the most simple guaranteed solution for everyone though would be a MiFi 2372: http://bit.ly/NBjB7 They are around $300-400 and are probably the best device, configuration wise, as the computer connects via WiFi. They share their 3G connection with up to 5 devices via WiFi. They are battery powered with around 4 hours use, but I'm fairly sure they can just charge / operate from USB (check with manufacturer on that one). Internode are selling them for use on the Optus network for $329, but these are the 900/1900/2100 verson On Sun, Jan 24, 2010 at 8:52 PM, Amos Shapira amos.shap...@gmail.com wrote: On 24 January 2010 10:44, Ben Sand b...@bensand.com wrote: Missed the start of this, but, FWIW: I have: 100MB/month: Next G Telstra Prepaid wireless running on Maxon BP3 USB Dongle + modem originally used with Bigpond) + it uses the prepaid phone system because the 100MB data blocks are cheaper than on the prepaid broadband plan. It's actually easier to register the sims that way. Thanks for the details. Does anyone know what chipset the Telstra turbo dongle uses? --Amos -- Marghanita da Cruz http://ramin.com.au Tel: 0414-869202 -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] grub error 15
On 26/01/10 23:25, da...@kenpro.com.au wrote: After doing a routine reboot I get grub error 15 on Ubuntu 8.10 Does this error occur before or after the GRUB menu appears? i.e. do you get presented with a menu to select which kernel at all, or does it bomb out before it gets to that stage? When I enter the BIOS I am only getting one option for booting into a hard-drive, although I recollect that previously I had to select which hard drive. The BIOS does recognise all three hard drives as being present. I am able to mount the bootable drive from a live CD and the data appears to be OK. Any suggestions what has gone amiss? It may well be that the GRUB MBR is simply looking at the wrong drive for the menu.lst file. In which case, re-running grub-install would be my first suggestion as a fix. It bombs before the kernel list. I've tried running: #grub-install /dev/sdc Could not find device for /boot: Not found or not a block device. fdisk reports /dev/sdc as the drive that should boot. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] debugging dns resolution issues with RES_OPTIONS=debug
Hello, This is my first post to slug - hopefully I've understood protocol from reading the list for a month or so. In the past, I've diagnosed dns client resolution issues using options debug in resolv.conf or setting the RES_OPTIONS environment variable as follows... export RES_OPTIONS=debug r...@aixbox:/ mailto:r...@toranim1:/ ping smh.com.au http://smh.com.au ;; res_setoptions(debug, env).. ;; debug ;; calling process id = 614598 ;; res_nquerydomain(smh.com.au http://smh.com.au, Nil, 1, 1) ;; res_query(smh.com.au http://smh.com.au, 1, 1) ;; res_nmkquery(QUERY, smh.com.au http://smh.com.au, IN, A) ;; res_send() ;; -HEADER- opcode: QUERY, status: NOERROR, id: 467 ;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; smh.com.au http://smh.com.au, type = A, class = IN ;; Querying server (# 1) address = 10.201.4.8 ;; got answer: ;; -HEADER- opcode: QUERY, status: NOERROR, id: 467 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; smh.com.au http://smh.com.au, type = A, class = IN smh.com.au http://smh.com.au. 1m12s IN A 203.26.51.71 PING smh.com.au http://smh.com.au (203.26.51.71): 56 data bytes --- smh.com.au http://smh.com.au ping statistics --- 2 packets transmitted, 0 packets received, 100% packet loss This has provided a means of tracing dns resolution issues, which has proved to be valuable for me on many occasions - the environments have been AIX, Solaris and Tru64 I use and manage two linux distros - Ubuntu 9.04 and sUSE 11.1. Both these distros document the options debug in the man page for resolv.conf However, neither Ubuntu or sUSE yield any dns client trace where I'd expect them too. b...@sam:~$ uname -a Linux sam 2.6.28-17-generic #58-Ubuntu SMP Tue Dec 1 18:57:07 UTC 2009 i686 GNU/Linux b...@sam:~$ export RES_OPTIONS=debug b...@sam:~$ ping www.smh.com.au PING a1040.b.akamai.net (150.101.195.89) 56(84) bytes of data. 64 bytes from 150.101.195.89: icmp_seq=1 ttl=61 time=30.9 ms Many moons ago, when I first read about options debug, I recall that gethostbyname could be built with or without various RES_OPTIONS. So, my questions are: 1) Is this the expected behaviour on various Linux distros or am I missing something? 2) Can anyone advise how to enable the debug capabilities in gethostbyname? Thanks in advance, Ben Burke -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] grub error 15
david == david da...@kenpro.com.au writes: On 26/01/10 23:25, da...@kenpro.com.au wrote: After doing a routine reboot I get grub error 15 on Ubuntu 8.10 Does this error occur before or after the GRUB menu appears? i.e. do you get presented with a menu to select which kernel at all, or does it bomb out before it gets to that stage? When I enter the BIOS I am only getting one option for booting into a hard-drive, although I recollect that previously I had to select which hard drive. The BIOS does recognise all three hard drives as being present. I am able to mount the bootable drive from a live CD and the data appears to be OK. Any suggestions what has gone amiss? It may well be that the GRUB MBR is simply looking at the wrong drive for the menu.lst file. In which case, re-running grub-install would be my first suggestion as a fix. david It bombs before the kernel list. I've tried running: david #grub-install /dev/sdc Could not find device for /boot: Not david found or not a block device. Hmmm. This sounds as if the mapping from BIOS to Linux drives is broken. Try grub-install with the --recheck option. -- Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] grub error 15
david == david da...@kenpro.com.au writes: On 26/01/10 23:25, da...@kenpro.com.au wrote: After doing a routine reboot I get grub error 15 on Ubuntu 8.10 Does this error occur before or after the GRUB menu appears? i.e. do you get presented with a menu to select which kernel at all, or does it bomb out before it gets to that stage? When I enter the BIOS I am only getting one option for booting into a hard-drive, although I recollect that previously I had to select which hard drive. The BIOS does recognise all three hard drives as being present. I am able to mount the bootable drive from a live CD and the data appears to be OK. Any suggestions what has gone amiss? It may well be that the GRUB MBR is simply looking at the wrong drive for the menu.lst file. In which case, re-running grub-install would be my first suggestion as a fix. david It bombs before the kernel list. I've tried running: david #grub-install /dev/sdc Could not find device for /boot: Not david found or not a block device. Hmmm. This sounds as if the mapping from BIOS to Linux drives is broken. Try grub-install with the --recheck option. The plot thickens . # grub-install --recheck /dev/sdc3 Could not find device for /boot: Not found or not a block device I unplugged all but the root drive and it boots perfectly. Progressively replugging all the drives seems to have random results. There is one IDE drive and three SATA, one of which is the rood drive and another one is in a caddy. I have had as many as two of the four extra drives running but can't get them all to go at once. I'm beginning to think it's a BIOS/motherboard problem. I've just rebooted again with only the boot drive plugged in. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] grub error 15
da...@kenpro.com.au wrote: david == david da...@kenpro.com.au writes: On 26/01/10 23:25, da...@kenpro.com.au wrote: After doing a routine reboot I get grub error 15 on Ubuntu 8.10 Does this error occur before or after the GRUB menu appears? i.e. do you get presented with a menu to select which kernel at all, or does it bomb out before it gets to that stage? When I enter the BIOS I am only getting one option for booting into a hard-drive, although I recollect that previously I had to select which hard drive. The BIOS does recognise all three hard drives as being present. I am able to mount the bootable drive from a live CD and the data appears to be OK. Any suggestions what has gone amiss? It may well be that the GRUB MBR is simply looking at the wrong drive for the menu.lst file. In which case, re-running grub-install would be my first suggestion as a fix. david It bombs before the kernel list. I've tried running: david #grub-install /dev/sdc Could not find device for /boot: Not david found or not a block device. Hmmm. This sounds as if the mapping from BIOS to Linux drives is broken. Try grub-install with the --recheck option. The plot thickens . # grub-install --recheck /dev/sdc3 Could not find device for /boot: Not found or not a block device I unplugged all but the root drive and it boots perfectly. Progressively replugging all the drives seems to have random results. There is one IDE drive and three SATA, one of which is the rood drive and another one is in a caddy. I have had as many as two of the four extra drives running but can't get them all to go at once. I'm beginning to think it's a BIOS/motherboard problem. I've just rebooted again with only the boot drive plugged in. I'll wager you have the grub MBR sitting on one of your other drives and the bios (as most do) randomly changes the boot order when you add new drives, so having that one in a caddy will mess with things. when it decides to boot off the one with the other grub you get an error. you can zero it if you want and see if that helps backup first dd if=/dev/hda of=/mbrbackup.bin bs=512 count=1 then zero dd if=/dev/zero of=/dev/hda bs=446 count=1 note the 446 bytes, if you do 512 it'll wipe the partition table (which is a bad thing) if your lucky that'll be enough that the bios will skip those when it comes to boot time. make sure your fstab is all done by uuid not path because that will probably change as you add and remove drives or the phase of the moon changes. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] grub error 15
da...@kenpro.com.au wrote: Snip # grub-install --recheck /dev/sdc3 Could not find device for /boot: Not found or not a block device I unplugged all but the root drive and it boots perfectly. Progressively replugging all the drives seems to have random results. There is one IDE drive and three SATA, one of which is the rood drive and another one is in a caddy. I have had as many as two of the four extra drives running but can't get them all to go at once. I'm beginning to think it's a BIOS/motherboard problem. I've just rebooted again with only the boot drive plugged in. Just a thought, but some BIOSes have trouble mixing SATA and IDE drives (Mine - Athalon64 Gigabyte board - is an example). One option to try if the boot drive is SATA then physically set the IDE drive to slave. It should then be moved to the end of the list. Most older BIOSes check for IDE drives first then look for SATA drives so it is not a great idea to mix the two. Heracles -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] grub error 15
On 27/01/10 09:56, da...@kenpro.com.au wrote: It bombs before the kernel list. I've tried running: #grub-install /dev/sdc Could not find device for /boot: Not found or not a block device. fdisk reports /dev/sdc as the drive that should boot. Likely because you're running it from the live CD, and it's trying to find the block device for your ramdisk. Try this, or commands to this effect: $ mkdir /tmp/ubuntu $ mount -t ext3 /dev/sdc3 /tmp/ubuntu $ grub-install --recheck --root-directory=/tmp/ubuntu /dev/sdc $ umount /tmp/ubuntu Jeremy. signature.asc Description: OpenPGP digital signature -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] grub error 15
This is still a mystery. However, I re-ordered the SATA leads so that the root drive was on SATA 0. It now boots with all drives working. Is this black magic? I didn't change the IDE. Interestingly, the noise that I thought was a beetle dying in the back of a cupboard turned out to be a noise in the power supply of this machine! The noise started yesterday, not long before I first ran into this problem. Is this a co-incidence? I'm now pretty sure the power supply is on the way out. I've been regularly re-booting this configuration for about a year without it every causing problems previously. da...@kenpro.com.au wrote: david == david da...@kenpro.com.au writes: On 26/01/10 23:25, da...@kenpro.com.au wrote: After doing a routine reboot I get grub error 15 on Ubuntu 8.10 Does this error occur before or after the GRUB menu appears? i.e. do you get presented with a menu to select which kernel at all, or does it bomb out before it gets to that stage? When I enter the BIOS I am only getting one option for booting into a hard-drive, although I recollect that previously I had to select which hard drive. The BIOS does recognise all three hard drives as being present. I am able to mount the bootable drive from a live CD and the data appears to be OK. Any suggestions what has gone amiss? It may well be that the GRUB MBR is simply looking at the wrong drive for the menu.lst file. In which case, re-running grub-install would be my first suggestion as a fix. david It bombs before the kernel list. I've tried running: david #grub-install /dev/sdc Could not find device for /boot: Not david found or not a block device. Hmmm. This sounds as if the mapping from BIOS to Linux drives is broken. Try grub-install with the --recheck option. The plot thickens . # grub-install --recheck /dev/sdc3 Could not find device for /boot: Not found or not a block device I unplugged all but the root drive and it boots perfectly. Progressively replugging all the drives seems to have random results. There is one IDE drive and three SATA, one of which is the rood drive and another one is in a caddy. I have had as many as two of the four extra drives running but can't get them all to go at once. I'm beginning to think it's a BIOS/motherboard problem. I've just rebooted again with only the boot drive plugged in. I'll wager you have the grub MBR sitting on one of your other drives and the bios (as most do) randomly changes the boot order when you add new drives, so having that one in a caddy will mess with things. when it decides to boot off the one with the other grub you get an error. you can zero it if you want and see if that helps backup first dd if=/dev/hda of=/mbrbackup.bin bs=512 count=1 then zero dd if=/dev/zero of=/dev/hda bs=446 count=1 note the 446 bytes, if you do 512 it'll wipe the partition table (which is a bad thing) if your lucky that'll be enough that the bios will skip those when it comes to boot time. make sure your fstab is all done by uuid not path because that will probably change as you add and remove drives or the phase of the moon changes. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] debugging dns resolution issues with RES_OPTIONS=debug
Hi Ben, You can debug most (all?) of the DNS client resolution issues with dig. You can test all the DNS client features, from a simple query to a full transfer zone. Regards Rodolfo Martínez Dirección de Proyectos Aleux México | http://www.aleux.com On Tue, Jan 26, 2010 at 5:04 PM, Ben Burke ben.bu...@internode.on.net wrote: Hello, This is my first post to slug - hopefully I've understood protocol from reading the list for a month or so. In the past, I've diagnosed dns client resolution issues using options debug in resolv.conf or setting the RES_OPTIONS environment variable as follows... export RES_OPTIONS=debug r...@aixbox:/ mailto:r...@toranim1:/ ping smh.com.au http://smh.com.au ;; res_setoptions(debug, env).. ;; debug ;; calling process id = 614598 ;; res_nquerydomain(smh.com.au http://smh.com.au, Nil, 1, 1) ;; res_query(smh.com.au http://smh.com.au, 1, 1) ;; res_nmkquery(QUERY, smh.com.au http://smh.com.au, IN, A) ;; res_send() ;; -HEADER- opcode: QUERY, status: NOERROR, id: 467 ;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; smh.com.au http://smh.com.au, type = A, class = IN ;; Querying server (# 1) address = 10.201.4.8 ;; got answer: ;; -HEADER- opcode: QUERY, status: NOERROR, id: 467 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; smh.com.au http://smh.com.au, type = A, class = IN smh.com.au http://smh.com.au. 1m12s IN A 203.26.51.71 PING smh.com.au http://smh.com.au (203.26.51.71): 56 data bytes --- smh.com.au http://smh.com.au ping statistics --- 2 packets transmitted, 0 packets received, 100% packet loss This has provided a means of tracing dns resolution issues, which has proved to be valuable for me on many occasions - the environments have been AIX, Solaris and Tru64 I use and manage two linux distros - Ubuntu 9.04 and sUSE 11.1. Both these distros document the options debug in the man page for resolv.conf However, neither Ubuntu or sUSE yield any dns client trace where I'd expect them too. b...@sam:~$ uname -a Linux sam 2.6.28-17-generic #58-Ubuntu SMP Tue Dec 1 18:57:07 UTC 2009 i686 GNU/Linux b...@sam:~$ export RES_OPTIONS=debug b...@sam:~$ ping www.smh.com.au PING a1040.b.akamai.net (150.101.195.89) 56(84) bytes of data. 64 bytes from 150.101.195.89: icmp_seq=1 ttl=61 time=30.9 ms Many moons ago, when I first read about options debug, I recall that gethostbyname could be built with or without various RES_OPTIONS. So, my questions are: 1) Is this the expected behaviour on various Linux distros or am I missing something? 2) Can anyone advise how to enable the debug capabilities in gethostbyname? Thanks in advance, Ben Burke -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] debugging dns resolution issues with RES_OPTIONS=debug
Thanks Rodolfo, Yes, I know about dig. But the problem I'm having appears to be failure of dns server to respond, or a communications problem with dns server(s) The problem I'm having is intermittent. I have a number of cron jobs that fail occasionally, failing to resolve a host name. The benefit of the option debug statement in resolv.conf is that the trace information will be written to stdout. This will allow me to see the nature of these intermittent failures. I strongly suspect a problem with the microsoft windows (win2k3 server) name services in this environment (yes I know - In jamie from Mythbusters voice they all say There's your problem!). I just need to prove that to be the case, or at least isolate what's going on. cheers, b Hi Ben, You can debug most (all?) of the DNS client resolution issues with dig. You can test all the DNS client features, from a simple query to a full transfer zone. Regards Rodolfo Martínez Dirección de Proyectos Aleux México | http://www.aleux.com On Tue, Jan 26, 2010 at 5:04 PM, Ben Burke ben.bu...@internode.on.net wrote: Hello, This is my first post to slug - hopefully I've understood protocol from reading the list for a month or so. In the past, I've diagnosed dns client resolution issues using options debug in resolv.conf or setting the RES_OPTIONS environment variable as follows... export RES_OPTIONS=debug r...@aixbox:/ mailto:r...@toranim1:/ ping smh.com.au http://smh.com.au ;; res_setoptions(debug, env).. ;; debug ;; calling process id = 614598 ;; res_nquerydomain(smh.com.au http://smh.com.au, Nil, 1, 1) ;; res_query(smh.com.au http://smh.com.au, 1, 1) ;; res_nmkquery(QUERY, smh.com.au http://smh.com.au, IN, A) ;; res_send() ;; -HEADER- opcode: QUERY, status: NOERROR, id: 467 ;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; smh.com.au http://smh.com.au, type = A, class = IN ;; Querying server (# 1) address = 10.201.4.8 ;; got answer: ;; -HEADER- opcode: QUERY, status: NOERROR, id: 467 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; smh.com.au http://smh.com.au, type = A, class = IN smh.com.au http://smh.com.au. 1m12s IN A 203.26.51.71 PING smh.com.au http://smh.com.au (203.26.51.71): 56 data bytes --- smh.com.au http://smh.com.au ping statistics --- 2 packets transmitted, 0 packets received, 100% packet loss This has provided a means of tracing dns resolution issues, which has proved to be valuable for me on many occasions - the environments have been AIX, Solaris and Tru64 I use and manage two linux distros - Ubuntu 9.04 and sUSE 11.1. Both these distros document the options debug in the man page for resolv.conf However, neither Ubuntu or sUSE yield any dns client trace where I'd expect them too. b...@sam:~$ uname -a Linux sam 2.6.28-17-generic #58-Ubuntu SMP Tue Dec 1 18:57:07 UTC 2009 i686 GNU/Linux b...@sam:~$ export RES_OPTIONS=debug b...@sam:~$ ping www.smh.com.au PING a1040.b.akamai.net (150.101.195.89) 56(84) bytes of data. 64 bytes from 150.101.195.89: icmp_seq=1 ttl=61 time=30.9 ms Many moons ago, when I first read about options debug, I recall that gethostbyname could be built with or without various RES_OPTIONS. So, my questions are: 1) Is this the expected behaviour on various Linux distros or am I missing something? 2) Can anyone advise how to enable the debug capabilities in gethostbyname? Thanks in advance, Ben Burke -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Wireless Broadband?
http://geobray.com/2010/01/19/broadband-3g-from-the-beach/ Marghanita -- Marghanita da Cruz http://ramin.com.au Tel: 0414-869202 -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
