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Q re raid on GA-K8N-ultra9 - geforce4
This board has both Nvidea raid & Sil raid
If, assuming mirror, raid1, do either of these have the capability of detecting an individual hd failure and to continue running the sys, without having to break the raid and boot from the functioning hd? ie The sys continues operating if an individual raid hd fails, without any user imput - other than acknowledging the failure. The mobo manual is not clear on this subject. |
#2
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Q re raid on GA-K8N-ultra9 - geforce4
Yes if RAID 10 (or any other real RAID) - seemlessly. That is the objective
of RAID - requndancy or discs, controllers, cabling, PUS's etc. and the ability to continue ifr any 1 of these items fail - the degree of failure you system cn cope with will be dependant on its config: for production I always have dual controllers, Server PSU's , cables, RAID 10 with 1 string of discs on 1 controller and the second on the second controller with redundant HDD PSU's + extra fans, fan / volatge monitoing, email / pager alerts + Hot standby disc drives + Tested spares. A lot can fail in that config and it will still go & it will tell you of failures & recover completely gining you the ability to hange out dead HDD's with no down time at all. RAID 1, 10 or 5 does this as do other forms of RAID, *NOT* RAID 0. As soon as you get a disc falure using any RAID (raid 0 is not real raid), you should have Either a Hot spare configured that will already be being synchronised in the back ground maintaining a running system with only some degradataion in performance. Or, on lower end RAID cards the system will continue to run - this is what real RAID is designed for. But you *must* IMO address the issue ASAP and Know in advance for each controller what to do when a disc fails. The longer you run RAID in a degraded mode the longer you run the risk of total loss as you are back to** No Raid and out naked in a storm. **often, but not always - you can have 2 discs fail in a four disc RAID 10, 3 in a 6 disc RAID 10 etc but the probability of such nice failures drops off. Paul wrote a few words about this the other day - have a look. The essential points: You *must* have a good backup reqime regardless. Discs in RAID configs fail. RAID controllers fail, PSU's fail and kill the lot - a 2nd disc can fail in close succession to a first so fix promptly, be prepared for the worst case. Rehearse faiures and know what to do in advance before you go into production. You won't want to be learning this when an array fails. So read around in this NG, see Paul's commencts and some of my own wafllings & never use "RAID 0" unless you can live with complete data loss of what is stored on such volumes (EG scratch files in video processing, large read only databases loaded anew monthly etc). HTH "old man" wrote in message ... This board has both Nvidea raid & Sil raid If, assuming mirror, raid1, do either of these have the capability of detecting an individual hd failure and to continue running the sys, without having to break the raid and boot from the functioning hd? ie The sys continues operating if an individual raid hd fails, without any user imput - other than acknowledging the failure. The mobo manual is not clear on this subject. |
#3
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Q re raid on GA-K8N-ultra9 - geforce4
Thanks,
I asked since I previously had raid 1 on an Sil cntrl.,Asus mobo A7N8X delux, when 1 hd failed, the sys went down and I had to break the raid before I could reboot, trying each disk in turn to discover which had failed, which it did fine except 2months of data, and some installed apps were missing! It seems the mirror had'nt been in sync. The raid utility software had given no warning of any problems, and had allways shown the mirror in sync! I'm currently using an Adaptec raid cntrl card, in mirror, which I 'know' will continue running the sys if a hd dies. I'll be adding a hot swap spare shortly, which will automatically replace/rebuild if a hd fails. BTHW I still have both onsite/offsite data backups.- dont think I can quite warrant the amount of redundency you seem to have. TY "Mercury" wrote in message ... Yes if RAID 10 (or any other real RAID) - seemlessly. That is the objective of RAID - requndancy or discs, controllers, cabling, PUS's etc. and the ability to continue ifr any 1 of these items fail - the degree of failure you system cn cope with will be dependant on its config: for production I always have dual controllers, Server PSU's , cables, RAID 10 with 1 string of discs on 1 controller and the second on the second controller with redundant HDD PSU's + extra fans, fan / volatge monitoing, email / pager alerts + Hot standby disc drives + Tested spares. A lot can fail in that config and it will still go & it will tell you of failures & recover completely gining you the ability to hange out dead HDD's with no down time at all. RAID 1, 10 or 5 does this as do other forms of RAID, *NOT* RAID 0. As soon as you get a disc falure using any RAID (raid 0 is not real raid), you should have Either a Hot spare configured that will already be being synchronised in the back ground maintaining a running system with only some degradataion in performance. Or, on lower end RAID cards the system will continue to run - this is what real RAID is designed for. But you *must* IMO address the issue ASAP and Know in advance for each controller what to do when a disc fails. The longer you run RAID in a degraded mode the longer you run the risk of total loss as you are back to** No Raid and out naked in a storm. **often, but not always - you can have 2 discs fail in a four disc RAID 10, 3 in a 6 disc RAID 10 etc but the probability of such nice failures drops off. Paul wrote a few words about this the other day - have a look. The essential points: You *must* have a good backup reqime regardless. Discs in RAID configs fail. RAID controllers fail, PSU's fail and kill the lot - a 2nd disc can fail in close succession to a first so fix promptly, be prepared for the worst case. Rehearse faiures and know what to do in advance before you go into production. You won't want to be learning this when an array fails. So read around in this NG, see Paul's commencts and some of my own wafllings & never use "RAID 0" unless you can live with complete data loss of what is stored on such volumes (EG scratch files in video processing, large read only databases loaded anew monthly etc). HTH "old man" wrote in message ... This board has both Nvidea raid & Sil raid If, assuming mirror, raid1, do either of these have the capability of detecting an individual hd failure and to continue running the sys, without having to break the raid and boot from the functioning hd? ie The sys continues operating if an individual raid hd fails, without any user imput - other than acknowledging the failure. The mobo manual is not clear on this subject. |
#4
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Q re raid on GA-K8N-ultra9 - geforce4
Dual everything on servers... including dual UPS & auto start generator.
Desktop dev systems, I use good PSU & RAID 1 & **UPS**. Sounds like you got in a pickle with your SIL controller either through a bios / controller firmware out of date dependancy, or ummmm you don't reboot enough, or something nasty has happened. I can't explain the unknown , but I have heard of odd things like that before. When I referred to Paul, I was also meaning the Asus NG too - seems you guessed. Sorry about the typos... BOL - Tim "old man" wrote in message ... Thanks, I asked since I previously had raid 1 on an Sil cntrl.,Asus mobo A7N8X delux, when 1 hd failed, the sys went down and I had to break the raid before I could reboot, trying each disk in turn to discover which had failed, which it did fine except 2months of data, and some installed apps were missing! It seems the mirror had'nt been in sync. The raid utility software had given no warning of any problems, and had allways shown the mirror in sync! I'm currently using an Adaptec raid cntrl card, in mirror, which I 'know' will continue running the sys if a hd dies. I'll be adding a hot swap spare shortly, which will automatically replace/rebuild if a hd fails. BTHW I still have both onsite/offsite data backups.- dont think I can quite warrant the amount of redundency you seem to have. TY "Mercury" wrote in message ... Yes if RAID 10 (or any other real RAID) - seemlessly. That is the objective of RAID - requndancy or discs, controllers, cabling, PUS's etc. and the ability to continue ifr any 1 of these items fail - the degree of failure you system cn cope with will be dependant on its config: for production I always have dual controllers, Server PSU's , cables, RAID 10 with 1 string of discs on 1 controller and the second on the second controller with redundant HDD PSU's + extra fans, fan / volatge monitoing, email / pager alerts + Hot standby disc drives + Tested spares. A lot can fail in that config and it will still go & it will tell you of failures & recover completely gining you the ability to hange out dead HDD's with no down time at all. RAID 1, 10 or 5 does this as do other forms of RAID, *NOT* RAID 0. As soon as you get a disc falure using any RAID (raid 0 is not real raid), you should have Either a Hot spare configured that will already be being synchronised in the back ground maintaining a running system with only some degradataion in performance. Or, on lower end RAID cards the system will continue to run - this is what real RAID is designed for. But you *must* IMO address the issue ASAP and Know in advance for each controller what to do when a disc fails. The longer you run RAID in a degraded mode the longer you run the risk of total loss as you are back to** No Raid and out naked in a storm. **often, but not always - you can have 2 discs fail in a four disc RAID 10, 3 in a 6 disc RAID 10 etc but the probability of such nice failures drops off. Paul wrote a few words about this the other day - have a look. The essential points: You *must* have a good backup reqime regardless. Discs in RAID configs fail. RAID controllers fail, PSU's fail and kill the lot - a 2nd disc can fail in close succession to a first so fix promptly, be prepared for the worst case. Rehearse faiures and know what to do in advance before you go into production. You won't want to be learning this when an array fails. So read around in this NG, see Paul's commencts and some of my own wafllings & never use "RAID 0" unless you can live with complete data loss of what is stored on such volumes (EG scratch files in video processing, large read only databases loaded anew monthly etc). HTH "old man" wrote in message ... This board has both Nvidea raid & Sil raid If, assuming mirror, raid1, do either of these have the capability of detecting an individual hd failure and to continue running the sys, without having to break the raid and boot from the functioning hd? ie The sys continues operating if an individual raid hd fails, without any user imput - other than acknowledging the failure. The mobo manual is not clear on this subject. |
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