Comments for dd if=/dev/random of=/dev/blog http://blog.hydrasystemsllc.com The blog of Petros Koutoupis. Thu, 11 Mar 2010 23:01:02 +0000 http://wordpress.org/?v=2.2.1 Comment on device-mapper (dm): working with multipath-tools. Part 1 by Eric http://blog.hydrasystemsllc.com/2009/03/21/device-mapper-dm-working-with-multipath-tools-part-1/#comment-16469 Eric Tue, 02 Mar 2010 23:11:32 +0000 http://blog.hydrasystemsllc.com/2009/03/21/device-mapper-dm-working-with-multipath-tools-part-1/#comment-16469 Called RedHat and they pointed me towards : http://kbase.redhat.com/faq/docs/DOC-17660 This solved my problem and now the server is booting off the new LUN The error I was getting was exactly as shown in the kbase article Called RedHat and they pointed me towards :
http://kbase.redhat.com/faq/docs/DOC-17660

This solved my problem and now the server is booting off the new LUN
The error I was getting was exactly as shown in the kbase article

]]> Comment on My frustration with Internet Explorer. by Frompoland http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16466 Frompoland Tue, 02 Mar 2010 20:09:58 +0000 http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16466 "It is hard to believe that Microsoft’s Internet Explorer still has the majority of market share" - why so hard to belive ? I used to work at one of the largest national organization in Poland. One of they security policy requirement every desktop PC must obey is that THE ONLY ALLOWED Web browser is IE. “It is hard to believe that Microsoft’s Internet Explorer still has the majority of market share” - why so hard to belive ? I used to work at one of the largest national organization in Poland. One of they security policy requirement every desktop PC must obey is that THE ONLY ALLOWED Web browser is IE.

]]> Comment on My frustration with Internet Explorer. by admin http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16448 admin Tue, 02 Mar 2010 13:42:06 +0000 http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16448 Thank you very much for the suggestion but unfortunately I had added the href portion of the window.location routine. IE still craps out at that exact line. Thank you very much for the suggestion but unfortunately I had added the href portion of the window.location routine. IE still craps out at that exact line.

]]> Comment on My frustration with Internet Explorer. by webdev http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16443 webdev Tue, 02 Mar 2010 06:37:17 +0000 http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16443 Ummm....you have read the spec at w3c right? cause if you did you would know that you should use window.location.href http://www.w3.org/TR/Window/#location please read the specs, otherwise you're only contributing to the hacked html that browser vendors, w3c, etc rant against. and i'm sure that's not your aim. (ducks to avoid being hit with rocks) Ummm….you have read the spec at
w3c right? cause if you did you
would know that you should use
window.location.href

http://www.w3.org/TR/Window/#location

please read the specs, otherwise
you’re only contributing to the
hacked html that browser vendors,
w3c, etc rant against. and i’m sure
that’s not your aim.

(ducks to avoid being hit with rocks)

]]> Comment on My frustration with Internet Explorer. by admin http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16440 admin Tue, 02 Mar 2010 03:57:32 +0000 http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16440 The song describes exactly what I was going through. ;-) The song describes exactly what I was going through. ;-)

]]> Comment on My frustration with Internet Explorer. by Matthews http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16438 Matthews Tue, 02 Mar 2010 03:02:53 +0000 http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16438 This is the song I.E. is being mean to me again I thought you might enjoy it. http://www.youtube.com/watch?v=vTTzwJsHpU8 This is the song I.E. is being mean to me again I thought you might enjoy it.

http://www.youtube.com/watch?v=vTTzwJsHpU8

]]> Comment on My frustration with Internet Explorer. by admin http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16426 admin Mon, 01 Mar 2010 13:33:52 +0000 http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16426 In the past and only for personal sites I used to redirect all IE browsers to a page stating that the browser was unsupported and that they need to download something more secure, more compliant to internet standards and more stable. I would then offer a list of browsers with associated links. In the past and only for personal sites I used to redirect all IE browsers to a page stating that the browser was unsupported and that they need to download something more secure, more compliant to internet standards and more stable. I would then offer a list of browsers with associated links.

]]> Comment on My frustration with Internet Explorer. by Cae http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16418 Cae Mon, 01 Mar 2010 05:45:20 +0000 http://blog.hydrasystemsllc.com/2010/02/28/my-frustration-with-internet-explorer/#comment-16418 This is a viscious cycle, e.g. because IE had a good chunk of browser share, you accommodate with the hacking around, also because many accommodates with the hacking around, resulting in IE having the good chunk of browser share :D This is a viscious cycle, e.g.

because IE had a good chunk of browser share, you accommodate with the hacking around,

also because many accommodates with the hacking around, resulting in IE having the good chunk of browser share

:D

]]> Comment on device-mapper (dm): working with multipath-tools. Part 1 by admin http://blog.hydrasystemsllc.com/2009/03/21/device-mapper-dm-working-with-multipath-tools-part-1/#comment-16354 admin Fri, 26 Feb 2010 21:52:16 +0000 http://blog.hydrasystemsllc.com/2009/03/21/device-mapper-dm-working-with-multipath-tools-part-1/#comment-16354 When the kernel panics, what does the error look like? What is displayed on the screen? Also in your dd script, you only need to specify bs once. This defines the transfer size from one medium to the other. 1K is also a small size. Not that it really matters in this application but it may not hurt to bump it up 1M or 2M. Also is /dev/sda the only volume in the volume group (VG) to which the LV is created from? Meaning are there any more physical volumes (PV), such as a /dev/sdb, etc.? When the kernel panics, what does the error look like? What is displayed on the screen?

Also in your dd script, you only need to specify bs once. This defines the transfer size from one medium to the other. 1K is also a small size. Not that it really matters in this application but it may not hurt to bump it up 1M or 2M.

Also is /dev/sda the only volume in the volume group (VG) to which the LV is created from? Meaning are there any more physical volumes (PV), such as a /dev/sdb, etc.?

]]> Comment on device-mapper (dm): working with multipath-tools. Part 1 by Eric http://blog.hydrasystemsllc.com/2009/03/21/device-mapper-dm-working-with-multipath-tools-part-1/#comment-16351 Eric Fri, 26 Feb 2010 20:20:08 +0000 http://blog.hydrasystemsllc.com/2009/03/21/device-mapper-dm-working-with-multipath-tools-part-1/#comment-16351 Hi, great info on this site! Do you have any experience mirroring a multipathed boot from san linux host? I currently have a boot from san host that I am attempting to migrate from one san to a new san and I am running into an issue where the mpath0 devices are not being created upon booting from the new san. I am running : dd if=/dev/sda bs=1k conv=sync,noerror of=/dev/sdc bs=1k when booted from a rescue CD and all copies well, on reboot when the OS tries to mount /(LVM Volume) it panics and is telling me I have a bad supper block.. my understanding was that if the multipathing was working, this block level copy should be the exact same and the /dev/mapper/mpath0 devices should be re-created. Sorry to just bounce stuff off you but you seem to know your multipathing :) Hi, great info on this site!
Do you have any experience mirroring a multipathed boot from san linux host?
I currently have a boot from san host that I am attempting to migrate from one san to a new san and I am running into an issue where the mpath0 devices are not being created upon booting from the new san.

I am running :
dd if=/dev/sda bs=1k conv=sync,noerror of=/dev/sdc bs=1k
when booted from a rescue CD and all copies well, on reboot when the OS tries to mount /(LVM Volume) it panics and is telling me I have a bad supper block.. my understanding was that if the multipathing was working, this block level copy should be the exact same and the /dev/mapper/mpath0 devices should be re-created.

Sorry to just bounce stuff off you but you seem to know your multipathing :)

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