Jump to content
|Topic||Stats||Last action by|
|Answered [Microsoft Excel 2013] How do I auto-fill cells?||
|Why does Gabe Aul spam me?||
|Meet Firefox Next||
|Questions About Office 2016 "Desktop Apps" and "Universal Apps"||
|Shops on fire, do you take stuff or run?||
Posted 25 May 2012 - 16:48
Posted 25 May 2012 - 21:04
Posted 27 May 2012 - 10:38
Posted 27 May 2012 - 15:47
Posted 28 May 2012 - 04:36
Fahim, cheers for that. Just been having a look at it and from what I can see it looks ideal!
Have a few questions if you have the time.
As I understand it the M1015 is the controller and may be present on differing cards (??) see: http://www.servetheh...ted-lsi-92208i/. Are there any specific brands I should look out for in terms of quality and reliability.
From a little further research JBOD is not what I need, as it still presents drives as individual. Hence I was looking at SPAN or RAID 0. What are your opinions in using RAID 0 for a backup?
- as a side note I found that RAID 0 uses little processing hence no need for onboard memory or processor, bonus!
If there is a power failure will this cause RAID rebuild or data loss, how have you found its reliability?
Posted 28 May 2012 - 09:33
The controller is a LSI SAS2008 ROC controller. I would guess the LSI version is the best to have, but I have the IBM and have had no problems with it so far. There are other rebadges too. I've found the IBM version cheaper for some reason, even if you include the Feature Key to make them functionally equivalent.
I wouldn't - I'd go RAID5 (preferably with a hot-spare) or RAID6 (ideally with a hot spare). For RAID5, it amounts to one drive to store parity.
I don't know. I've not had a power failure since using the card.
RAID 0 offers no redundancy, which is why it doesn't require any extra work on the RAID card processor or memory, and can result in data loss. As long as you don't have a write back cache activated without using some sort of Battery Backup Unit you shouldn't have to worry about massive data loss on a power failure (so long as the drive survives the power outage). If you do lose a drive though you won't be able to recover at all.
RAID 0 is great for when you need very fast reads speeds and can tolerate the data being lost completely due to a drive failure. An example could be an OS drive where actual data is stored on a RAID 5 volume or such. Basically, if you need it to survive a drive failure don't put it on a RAID 0.
That being said, no RAID level is an excuse for not having a backup. A RAID 5 can survive a single drive failure, but it can't survive two drive failures happening before the spare drive has been brought up to speed, for instance. No RAID level will protect you from an accidental deletion or a rogue program or operating system or drive bug corrupting your data. Keep all of this in mind.
Posted 29 May 2012 - 22:41
In terms of RAID 5 speed, what are we talking about on this card. Bearing in mind no on board processor/memory?