farmerpling2
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These numbers are "rough." Use them to help provide a better understanding of which drives may be the ones that you should buy...
A couple useful pieces of information that you should consider are:
I have tried to keep it simple and not expound heavily into technology or math.
A couple useful pieces of information that you should consider are:
- Warranty - The longer the warranty, the more the drive will cost, but usually it is made of higher quality materials and processes to manufacturer the drive.
- Consumer <2 years
- SOHO >3 year
- Enterprise >5 years
- Workload rate (rough data points) - Typically manufacturers use this number to limit the warranty. It provides some information on wear and usage of the drive.
- Consumer <~180TB transfer/year
- SOHO <~300TB transfer/year
- Enterprise >300TB transfer/year
- MTBF -> Statistical measurement used to show you information on failure of disk drives. It gives you a rough idea on a drives possible failure. Generally, the higher the number the less likely you will have a failure.
- Consumer <750,000 hours
- SOHO around 1 million hours
- Enterprise >3 million hours
- Nonrecoverable Read Errors per Bits Read -> Think of this as how many bits read before a read failure (i.e. bad block{s}) occur.
- Consumer - 10E14
- SOHO - 10E15
- Enterprise - 10E15+ (some as high as 10E16).
- Load / Unload Cycles - How often are the drives armature/heads moved to a safe "park" area. Example: The drive might still be spinning, but if you dropped your laptop, this would decrease the chance of the armature/heads from contacting the rotating media.
- Consumer - 600,000
- SOHO - ~1,000,000
- Enterprise - >1,000,000
I have tried to keep it simple and not expound heavily into technology or math.
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