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6

The real problem regarding URE and RAID5 is that, upon encoutering even a single URE, many hardware controllers simply aborts the RAID reconstruction and declare the array death, putting all your data offline. While this is the "safer bet" regarding potential data corruption, it is not always the best thing to do (eg: think about a URE affecting a ...


2

In principle, yes, but if you store your backup on a RAID6 (as an example), you will have the benefit of the redundancy, so the total error rate will be much lower, and with it the chance of an URE during recovery. If you use a tape backup solution, the error rates are much lower to begin with (SAS: 1x10^-15 - 1x10^-16, LTO7: 1x10^-19).


2

I would tell 785991-B21 ID found there; http://h20195.www2.hp.com/V2/GetDocument.aspx?docname=4AA5-4154ENW&cc=us&lc=en I'am just not sure as a simple google search give various picture for it and partsurfer got no picture associated with it.. One picture found look like your older cable but I can't double check my answer


1

Anything on the volume is at risk If you are stating that you have a concern regarding URE on a volume/LUN that has suffered from a RAID 5/6 drive failure then all of the data on that volume would be at risk. Ensure you are storing your data on a different volume/LUN than your backup is stored on. Best practice would state your backup is on a completely ...


1

The difference is the SSD's drive used. It exist enterprise grad model and 'client' model. For enterprise grad model you can expect a longer life, and a better algorith to be sure it will run for the 5 years. I give an example, in enterprise I seen last week SSD for a SAN, they were sold at around 3K$ each for 500gb only. 1st server (2 x SAMSUNG ...


1

Massimo gave a pretty good summary and as he says, a lot depends on the kind of workload you are running. In addition, the controllers and their firmware play a big role. For instance, at home I have an LSI 8 port SAS/SATA HBA that can be flashed to run as a RAID controller. The same hardware is badged by Dell but the firmware sets up a different queue ...



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