Comments for In Transition from Windows to Linux http://blog.arsenypersik.com and other technology related observations by Arseny Persik. Sun, 04 Apr 2010 23:56:45 +0000 hourly 1 http://wordpress.org/?v=3.3.1 Comment on How To Set Up a RAID Array Using Palimpsest Disk Utility – part II: RAID 0 by Arseny Persik http://blog.arsenypersik.com/how-to-set-up-a-raid-array-using-palimpsest-disk-utility-part-ii-raid-0/207/comment-page-1/#comment-46 Arseny Persik Sun, 04 Apr 2010 23:56:45 +0000 http://blog.arsenypersik.com/?p=207#comment-46 Thanks! Yes, same here - palimpsest seems to operate on per disk level rather than on per partition. Thanks!
Yes, same here – palimpsest seems to operate on per disk level rather than on per partition.

]]> Comment on How To Set Up a RAID Array Using Palimpsest Disk Utility – part II: RAID 0 by urakaipa http://blog.arsenypersik.com/how-to-set-up-a-raid-array-using-palimpsest-disk-utility-part-ii-raid-0/207/comment-page-1/#comment-45 urakaipa Sun, 28 Mar 2010 11:33:12 +0000 http://blog.arsenypersik.com/?p=207#comment-45 Hi, nice article (also read the firs part). just want to know if it is possible to use palimpsest to create software raid from 2 or more partitions and not just whole hard drives. as far as tried, i was not able to do it. I've two drives, identical partitioned (i created the layout for the first and simply copied to the other one); now i set up e.g sda3 and sdb3 as linux raid (0xfd) and i would like to create a RAID1 with these two partitions, but palimpsest just look for whole unused drives. anyway time ago I created such raid manually with mdadm command and palimsest shows them correctly (even if i can't do Check, Add and so on..) Hi, nice article (also read the firs part).
just want to know if it is possible to use palimpsest to create software raid from 2 or more partitions and not just whole hard drives.
as far as tried, i was not able to do it.

I’ve two drives, identical partitioned (i created the layout for the first and simply copied to the other one); now i set up e.g sda3 and sdb3 as linux raid (0xfd) and i would like to create a RAID1 with these two partitions, but palimpsest just look for whole unused drives.

anyway time ago I created such raid manually with mdadm command and palimsest shows them correctly (even if i can’t do Check, Add and so on..)

]]> Comment on How To Set Up a RAID Array Using Palimpsest Disk Utility – part I: RAID 5 by Dmitry http://blog.arsenypersik.com/how-to-set-up-a-raid-using-palimpsest-disk-utility-2/180/comment-page-1/#comment-44 Dmitry Thu, 04 Mar 2010 03:56:18 +0000 http://blog.arsenypersik.com/?p=180#comment-44 Here's one other thing you want to mention. The drives don't need to be the same. However, in a raid 1 or 5, it will round everything down to the smallest device and ignore the excess space. Now if you find yourself in a situation when one of your drives died and you need a replacement, be careful. Hard drives from different manufacturers may differ in size slightly, despite being marketed as having the same volume. The difference in geometry is not important, but the total block size is. And if your new drive is slightly less than the rest, your only option is to re-create the whole array (and abandon the data recovery) or take it back to the store. One of the RAID guides I've seen recommended to cut off 1-2% off the total drive space when you create the array to compensate for issues like that. Unless you're sure you can find the exact replacement, or feeling adventurous. Here’s one other thing you want to mention. The drives don’t need to be the same. However, in a raid 1 or 5, it will round everything down to the smallest device and ignore the excess space. Now if you find yourself in a situation when one of your drives died and you need a replacement, be careful. Hard drives from different manufacturers may differ in size slightly, despite being marketed as having the same volume. The difference in geometry is not important, but the total block size is. And if your new drive is slightly less than the rest, your only option is to re-create the whole array (and abandon the data recovery) or take it back to the store. One of the RAID guides I’ve seen recommended to cut off 1-2% off the total drive space when you create the array to compensate for issues like that. Unless you’re sure you can find the exact replacement, or feeling adventurous.

]]> Comment on How To Set Up a RAID Array Using Palimpsest Disk Utility – part II: RAID 0 by Dmitry http://blog.arsenypersik.com/how-to-set-up-a-raid-array-using-palimpsest-disk-utility-part-ii-raid-0/207/comment-page-1/#comment-43 Dmitry Thu, 04 Mar 2010 03:34:28 +0000 http://blog.arsenypersik.com/?p=207#comment-43 I'm failing to find any practical use for RAID0, to be honest - for that very reason of the whole array going down if one of the drives dies (ask me how I know :(... I'd say that it might be better to just define a bunch of chunks and merge them using LVM. At least the volume will be still alive when one of them does down. I’m failing to find any practical use for RAID0, to be honest – for that very reason of the whole array going down if one of the drives dies (ask me how I know :( … I’d say that it might be better to just define a bunch of chunks and merge them using LVM. At least the volume will be still alive when one of them does down.

]]> Comment on Diving into PHP for C# Developers by Arseny Persik http://blog.arsenypersik.com/diving-into-php-for-c-developers/142/comment-page-1/#comment-40 Arseny Persik Wed, 10 Feb 2010 00:15:23 +0000 http://blog.arsenypersik.com/?p=142#comment-40 Well, they say:"with power comes a great responsibility". And I guess during the last few years I just got a little bit spoiled by C# and it's IDE (Visual Studio)... ;-) Well, they say:”with power comes a great responsibility”. And I guess during the last few years I just got a little bit spoiled by C# and it’s IDE (Visual Studio)… ;-)

]]> Comment on Diving into PHP for C# Developers by CT http://blog.arsenypersik.com/diving-into-php-for-c-developers/142/comment-page-1/#comment-39 CT Tue, 09 Feb 2010 23:42:48 +0000 http://blog.arsenypersik.com/?p=142#comment-39 Oh, don't get me wrong, I *like* PHP lots. TONS of major sites use it (including our friendly Facebook), but I thought you were griping about how much less strict it is than "real" languages. It's clumsy, inconsistent, very imperfect stuff, but it somehow gets the job done. Continued success in your climb up the learning curve (i'm sure you'll crest it in no time--then you can teach me some stuff!) Oh, don’t get me wrong, I *like* PHP lots. TONS of major sites use it (including our friendly Facebook), but I thought you were griping about how much less strict it is than “real” languages. It’s clumsy, inconsistent, very imperfect stuff, but it somehow gets the job done. Continued success in your climb up the learning curve (i’m sure you’ll crest it in no time–then you can teach me some stuff!)

]]> Comment on Diving into PHP for C# Developers by Arseny Persik http://blog.arsenypersik.com/diving-into-php-for-c-developers/142/comment-page-1/#comment-38 Arseny Persik Tue, 09 Feb 2010 06:27:28 +0000 http://blog.arsenypersik.com/?p=142#comment-38 Yes sir, will look into this! :-) Yes sir, will look into this! :-)

]]> Comment on Diving into PHP for C# Developers by Dmitry http://blog.arsenypersik.com/diving-into-php-for-c-developers/142/comment-page-1/#comment-37 Dmitry Tue, 09 Feb 2010 03:44:23 +0000 http://blog.arsenypersik.com/?p=142#comment-37 Code formatting helps too, even in a blog ;] Code formatting helps too, even in a blog ;]

]]> Comment on Diving into PHP for C# Developers by Arseny Persik http://blog.arsenypersik.com/diving-into-php-for-c-developers/142/comment-page-1/#comment-36 Arseny Persik Tue, 09 Feb 2010 01:58:22 +0000 http://blog.arsenypersik.com/?p=142#comment-36 Well, there are tons of enterprise sites build with PHP. So I think whoever uses it should be at least aware :-) Well, there are tons of enterprise sites build with PHP. So I think whoever uses it should be at least aware :-)

]]> Comment on Diving into PHP for C# Developers by CT http://blog.arsenypersik.com/diving-into-php-for-c-developers/142/comment-page-1/#comment-35 CT Tue, 09 Feb 2010 01:25:18 +0000 http://blog.arsenypersik.com/?p=142#comment-35 Hey, it's a scripting language, meant for rapid prototyping using the old "worse is better" and "do what i mean" approaches. PHP/Perl people think this is a feature. You've got a case of engineer's "build it right"-itis ;-) Hey, it’s a scripting language, meant for rapid prototyping using the old “worse is better” and “do what i mean” approaches. PHP/Perl people think this is a feature. You’ve got a case of engineer’s “build it right”-itis ;-)

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