Comments for Alex Hopmann's Blog http://www.alexhopmann.com Modern Art makes me want to rock out Sat, 18 May 2013 12:17:43 +0000 http://wordpress.org/?v=2.7 hourly 1 Comment on Silicon Image SATARAID5 and Reboots by max http://www.alexhopmann.com/2008/07/28/silicon-image-sataraid5-and-reboots/comment-page-2/#comment-371560 max Sat, 02 Feb 2013 12:09:48 +0000 http://www.alexhopmann.com/2008/07/28/silicon-image-sataraid5-and-reboots/#comment-371560 Cheack Configuration > Advanced Options >Advanced RAID Features Enables the selection of an Improper Shutdown Policy (including Check-Pointing and Dirty Parity handling) in the Create RAID Group dialog box when the selected RAID Group type is a fault-tolerant configuration (Mirrored, Mirrored/Striped and Parity RAID). This feature is not supported for Legacy RAID groups. Cheack
Configuration > Advanced Options >Advanced RAID Features

Enables the selection of an Improper Shutdown Policy (including Check-Pointing and Dirty Parity handling) in the Create RAID Group dialog box when the selected RAID Group type is a fault-tolerant configuration (Mirrored, Mirrored/Striped and Parity RAID). This feature is not supported for Legacy RAID groups.

]]> Comment on Sous Vide Buffalo Wings by brett http://www.alexhopmann.com/2013/01/14/sous-vide-buffalo-wings/comment-page-1/#comment-365037 brett Wed, 16 Jan 2013 21:50:12 +0000 http://www.alexhopmann.com/?p=659#comment-365037 sound awesome! thanks for posting. sound awesome! thanks for posting.

]]> Comment on Memcache Race Condition Fun by tom http://www.alexhopmann.com/2008/06/13/memcache-race-condition-fun/comment-page-1/#comment-325080 tom Tue, 06 Nov 2012 20:03:02 +0000 http://www.alexhopmann.com/2008/06/13/memcache-race-condition-fun/#comment-325080 ok, you're right. Sorry. I'm using memcached, not memcache. It works for me, if I use: if(($cached == NULL) or ($memcacheD->expire + rand(0,30) > time())) { ... No Idea why, but it does. Using 'less then' is going nuts here. Maybe it's no working condition, but I got less race conditions. ok, you’re right. Sorry.

I’m using memcached, not memcache. It works for me, if I use:

if(($cached == NULL) or ($memcacheD->expire + rand(0,30) > time())) { …

No Idea why, but it does. Using ‘less then’ is going nuts here. Maybe it’s no working condition, but I got less race conditions.

]]> Comment on Memcache Race Condition Fun by Alex http://www.alexhopmann.com/2008/06/13/memcache-race-condition-fun/comment-page-1/#comment-325069 Alex Tue, 06 Nov 2012 19:29:21 +0000 http://www.alexhopmann.com/2008/06/13/memcache-race-condition-fun/#comment-325069 Nope- if you do '> time()' it will expire right away. We are testing for when the current time is greater than the expiration time (+ the random bit). Nope- if you do ‘> time()’ it will expire right away. We are testing for when the current time is greater than the expiration time (+ the random bit).

]]> Comment on Memcache Race Condition Fun by tom http://www.alexhopmann.com/2008/06/13/memcache-race-condition-fun/comment-page-1/#comment-325067 tom Tue, 06 Nov 2012 19:25:50 +0000 http://www.alexhopmann.com/2008/06/13/memcache-race-condition-fun/#comment-325067 i think you did a mistake. use $myobj->expire + rand(0,120) > time()) instead of $myobj->expire + rand(0,120) < time()) i think you did a mistake.
use
$myobj->expire + rand(0,120) > time())
instead of
$myobj->expire + rand(0,120) < time())

]]> Comment on Silicon Image SATARAID5 and Reboots by Darron http://www.alexhopmann.com/2008/07/28/silicon-image-sataraid5-and-reboots/comment-page-2/#comment-223659 Darron Fri, 13 Jan 2012 11:55:40 +0000 http://www.alexhopmann.com/2008/07/28/silicon-image-sataraid5-and-reboots/#comment-223659 Odd? I do not have the Check Pointing option? I am building a new RAID array and the check point option is nowhere to be seen? It was there before, so I can only assume the latest drivers or software (which I am using) has removed this? Does this mean it is disabled by default? I do not really want to wait for a few days to see if this works... Odd?

I do not have the Check Pointing option?

I am building a new RAID array and the check point option is nowhere to be seen? It was there before, so I can only assume the latest drivers or software (which I am using) has removed this?

Does this mean it is disabled by default?

I do not really want to wait for a few days to see if this works…

]]> Comment on Silicon Image SATARAID5 and Reboots by Darron http://www.alexhopmann.com/2008/07/28/silicon-image-sataraid5-and-reboots/comment-page-2/#comment-223658 Darron Fri, 13 Jan 2012 11:53:43 +0000 http://www.alexhopmann.com/2008/07/28/silicon-image-sataraid5-and-reboots/#comment-223658 Hi Guys, I stumbled on this site after having this issue for the fist time. I have been trying to copy about 5Tb of data back to the new RAID5 volume from various smaller drives on my system. After a break in copying (all data copied from one of the disks) I let the system reboot as Windows Update was bugging me. Following this reboot, the RAID array wanted to rebuild again - not what I needed after several days of rebuilding and copying of data! The RAID array is slow enough without trying to copy data during a rebuild! I decided to start again disable check-pointing as per the fix above and hopefully this will resolve the issue. In direct response to TTP above, I found that if I remove all drives (except 1) I can delete the broken RAID group without needing to wait for the rebuild to finish. I then added one drive at a time and deleted each time. When all drives were re-added and raid group deleted I could then re-create the RAID5 group! That saved me a few days! Hi Guys,

I stumbled on this site after having this issue for the fist time. I have been trying to copy about 5Tb of data back to the new RAID5 volume from various smaller drives on my system. After a break in copying (all data copied from one of the disks) I let the system reboot as Windows Update was bugging me.

Following this reboot, the RAID array wanted to rebuild again - not what I needed after several days of rebuilding and copying of data! The RAID array is slow enough without trying to copy data during a rebuild!

I decided to start again disable check-pointing as per the fix above and hopefully this will resolve the issue.

In direct response to TTP above, I found that if I remove all drives (except 1) I can delete the broken RAID group without needing to wait for the rebuild to finish. I then added one drive at a time and deleted each time. When all drives were re-added and raid group deleted I could then re-create the RAID5 group! That saved me a few days!

]]> Comment on Wine in a Blender by brett http://www.alexhopmann.com/2012/01/04/wine-in-a-blender/comment-page-1/#comment-221942 brett Thu, 05 Jan 2012 16:16:05 +0000 http://www.alexhopmann.com/?p=628#comment-221942 i've had sous vide steaks at a couple of high end restaurants (assuming they'd know how to do a killer job), and can't say i was very impressed. yes, it was dialed into the exact temp; but it felt sterile and had in both cases a hint of plastics. felt and tasted like a very unskillful way to cook meat. i’ve had sous vide steaks at a couple of high end restaurants (assuming they’d know how to do a killer job), and can’t say i was very impressed. yes, it was dialed into the exact temp; but it felt sterile and had in both cases a hint of plastics. felt and tasted like a very unskillful way to cook meat.

]]> Comment on Silicon Image SATARAID5 and Reboots by TTP http://www.alexhopmann.com/2008/07/28/silicon-image-sataraid5-and-reboots/comment-page-2/#comment-221694 TTP Wed, 04 Jan 2012 13:33:40 +0000 http://www.alexhopmann.com/2008/07/28/silicon-image-sataraid5-and-reboots/#comment-221694 OK massive issues for me... First off is there ANY way to delete the RAID array with-out it doing the 73 hours of restoring redundancy? After HOURS of experimenting I finally found a way.... Please note ensure you don't want any of the data on the drive! In other words back it up! Disable your on-board SATA if it's BIOS prevents you from seeing the card BIOS (which mine does, not usually an issue as I can use the SATARAID5 tool). Create a RAID0 (not 5!) array, reboot, turn the on-board SATA back on. Reboot, then go into windows, ensure you delete the old array in the SATARAID5 tool, convert the BIOS made one (right click on it). Use the drive (Quick format, etc) to ensure the old one is gone for good, then delete the RAID0 and reboot again and.... it's gone! FINALLY! YAY! This was actually the only way I could even remake the drive setup correctly (turn off checkpoint). This may have been due it originally being made on another system but unconfirmed... Also note this occured in thanks to windows "repairing" the drive after rebooting after spending 68 hours of array creation... Windows 7 decided it should repair the drive for me, isn't it great? Now to wait yet another 48 hours of array creation... I also trialed the rebooting to ensure it doesn't do the RR, thanks a lot to all who added comments and assistance above! OK massive issues for me… First off is there ANY way to delete the RAID array with-out it doing the 73 hours of restoring redundancy? After HOURS of experimenting I finally found a way….

Please note ensure you don’t want any of the data on the drive! In other words back it up!

Disable your on-board SATA if it’s BIOS prevents you from seeing the card BIOS (which mine does, not usually an issue as I can use the SATARAID5 tool).
Create a RAID0 (not 5!) array, reboot, turn the on-board SATA back on.
Reboot, then go into windows, ensure you delete the old array in the SATARAID5 tool, convert the BIOS made one (right click on it).
Use the drive (Quick format, etc) to ensure the old one is gone for good, then delete the RAID0 and reboot again and…. it’s gone! FINALLY! YAY!

This was actually the only way I could even remake the drive setup correctly (turn off checkpoint). This may have been due it originally being made on another system but unconfirmed…

Also note this occured in thanks to windows “repairing” the drive after rebooting after spending 68 hours of array creation… Windows 7 decided it should repair the drive for me, isn’t it great?

Now to wait yet another 48 hours of array creation… I also trialed the rebooting to ensure it doesn’t do the RR, thanks a lot to all who added comments and assistance above!

]]> Comment on Details of the New Desktop PC for 2011 by Alex http://www.alexhopmann.com/2011/11/29/details-of-the-new-desktop-pc-for-2011/comment-page-1/#comment-216823 Alex Thu, 08 Dec 2011 18:35:57 +0000 http://www.alexhopmann.com/?p=616#comment-216823 I haven't measured the performance myself directly, but I was talking about this with someone else last night and they said a friend had measured and that boot from VHD was actually faster than raw-disk, at least on a SSD. I'm not sure how that really makes sense, but my experience is the system is extremely fast when accessing anything on the system drive & boot times are amazing. I haven’t measured the performance myself directly, but I was talking about this with someone else last night and they said a friend had measured and that boot from VHD was actually faster than raw-disk, at least on a SSD. I’m not sure how that really makes sense, but my experience is the system is extremely fast when accessing anything on the system drive & boot times are amazing.

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