Re: Debian installer and raid0

2013-10-13 Thread Francesco Pietra
Hello: I know that a correct software mirror raid is subject to failures, when anything wrong is written to both disks. And I also know that hardware mirror raid is subject to hardware failures. I said at the beginning that I keep two wheezy mirror-raid servers with the same data and software. Now

Re: Debian installer and raid0

2013-10-13 Thread Bob Proulx
Francesco Pietra wrote: PS: You did not comment whether the pipe' command that I use to verify grub has a general validity. As far as I could use it, I found it equivalent to examining each disk, one at a time. It was clever! It was definitely in the spirit of the Unix philosophy. At the

Re: Debian installer and raid0

2013-10-12 Thread Bob Proulx
Francesco Pietra wrote: I hope not to bother beyond the limit, but the security of mirror raid is something of utmost importance, at least in my work of biochemist, with very limited ability in recovering from disk failures. I must express concern. While RAID is very useful to keeping a

Re: Debian installer and raid0

2013-10-09 Thread Tom H
On Tue, Oct 8, 2013 at 11:11 AM, Francesco Pietra chiendar...@gmail.com wrote: I hope not to bother beyond the limit, but the security of mirror raid is something of utmost importance, at least in my work of biochemist, with very limited ability in recovering from disk failures. I planned to

Fwd: Debian installer and raid0

2013-10-09 Thread Francesco Pietra
PM Subject: Re: Debian installer and raid0 To: debian-users debian-user@lists.debian.org, amd64 Debian debian-am...@lists.debian.org I hope not to bother beyond the limit, but the security of mirror raid is something of utmost importance, at least in my work of biochemist, with very limited

Re: Debian installer and raid0

2013-10-08 Thread Francesco Pietra
I hope not to bother beyond the limit, but the security of mirror raid is something of utmost importance, at least in my work of biochemist, with very limited ability in recovering from disk failures. I planned to use the double-opteron, two sockets, server, tya 64, as a victim for the test you

Re: Debian installer and raid0

2013-10-07 Thread Francesco Pietra
I have no other machines than the said two servers. As soon as a machine was dismissed, parts were recovered for the new machines. Does not matter, I'll try. What I was also asking, however, was how to boot to the grub only: I forgot asking naively how to boot safely to the grub menu. With both

Re: Debian installer and raid0

2013-10-07 Thread Bob Proulx
Francesco Pietra wrote: I forgot asking naively how to boot safely to the grub menu. Press a key on the keyboard before the 5 second count down timer counts all of the way down. Pressing a key stops the timer and causes it to stay on the menu waiting for keyboard input. Bob signature.asc

Re: Debian installer and raid0

2013-10-06 Thread Tom H
On Thu, Oct 3, 2013 at 3:31 AM, Francesco Pietra chiendar...@gmail.com wrote: Did you use a recent version of the installer? What I would like to know - before reinstalling everything on my servers - is whether the option to set grub on both disks of raid 0 has now been introduced. No. --

Re: Debian installer and raid0

2013-10-06 Thread Tom H
On Sun, Oct 6, 2013 at 12:26 PM, Tom H tomh0...@gmail.com wrote: On Thu, Oct 3, 2013 at 3:31 AM, Francesco Pietra chiendar...@gmail.com wrote: Did you use a recent version of the installer? What I would like to know - before reinstalling everything on my servers - is whether the option to

Re: Debian installer and raid0

2013-10-06 Thread Tom H
On Fri, Oct 4, 2013 at 3:11 AM, Francesco Pietra chiendar...@gmail.com wrote: recall that it has been added with Wheezy. But let me put forward that it doesn't really matter. If you have RAID then you know you want grub on both disks. After installing simply run the grub install script

Re: Debian installer and raid0

2013-10-06 Thread Bob Proulx
Francesco Pietra wrote: Thanks so much. I am also using raid1 since I met Debian, so many years ago. However the poor way I described. I'll do what you suggest as soon time permits, although the cables to the HDs in the old server are difficultly accessible. And, in the meantime, I would be at

Re: Fwd: Debian installer and raid0

2013-10-06 Thread Bob Proulx
Klaus wrote: Francesco Pietra wrote: I forgot asking naively how to boot safely to the grub menu. When the system starts booting, the grub menu entries appear on screen. After a timeout (default 5 sec) the default entry is selected and the boot sequence continues. For details, here is the

Re: Debian installer and raid0

2013-10-05 Thread Francesco Pietra
Thanks so much. I am also using raid1 since I met Debian, so many years ago. However the poor way I described. I'll do what you suggest as soon time permits, although the cables to the HDs in the old server are difficultly accessible. And, in the meantime, I would be at a single server, insecure

Fwd: Debian installer and raid0

2013-10-05 Thread Francesco Pietra
Pietra chiendar...@gmail.com Date: Sat, Oct 5, 2013 at 9:21 AM Subject: Re: Debian installer and raid0 To: debian-users debian-user@lists.debian.org, amd64 Debian debian-am...@lists.debian.org Thanks so much. I am also using raid1 since I met Debian, so many years ago. However the poor way I

Re: Fwd: Debian installer and raid0

2013-10-05 Thread Klaus
On 05/10/13 09:00, Francesco Pietra wrote: I forgot asking naively how to boot safely to the grub menu. When the system starts booting, the grub menu entries appear on screen. After a timeout (default 5 sec) the default entry is selected and the boot sequence continues. For details, here is

Re: Debian installer and raid0

2013-10-04 Thread Francesco Pietra
recall that it has been added with Wheezy. But let me put forward that it doesn't really matter. If you have RAID then you know you want grub on both disks. After installing simply run the grub install script against both disks manually and then you will be assured that it has been

Re: Debian installer and raid0

2013-10-04 Thread Bob Proulx
Francesco Pietra wrote: Bob Proulx wrote: After installing simply run the grub install script against both disks manually and then you will be assured that it has been installed on both disks. I had problems with that methodology and was unable to detect my error. From a thread on

Debian installer and raid0

2013-10-03 Thread Francesco Pietra
Hello: Did you use a recent version of the installer? What I would like to know - before reinstalling everything on my servers - is whether the option to set grub on both disks of raid 0 has now been introduced. Thanks francesco pietra

Re: Debian installer and raid0

2013-10-03 Thread recoverym4n
Hi. On Thu, 3 Oct 2013 09:31:42 +0200 Francesco Pietra chiendar...@gmail.com wrote: Hello: Did you use a recent version of the installer? What I would like to know - before reinstalling everything on my servers - is whether the option to set grub on both disks of raid 0 has now been

Re: Debian installer and raid0

2013-10-03 Thread Bob Proulx
Francesco Pietra wrote: Did you use a recent version of the installer? What I would like to know - before reinstalling everything on my servers - is whether the option to set grub on both disks of raid 0 has now been introduced. I recall that it has been added with Wheezy. But let me put