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Re: [enterprise] Maskiner med 128 GB RAM - erfaringer



Hanne Munkholm wrote:
> On Mon, 20 Apr 2009, Donald Axel wrote:
> 
>> Undskyld, den har fået flere diske:
>> Disksystemet er små 4TB RAID som bruges til spejling,
>> ca. 2TB file-space. Den har kørt i knap et år nu.
> 
> Vores disksystem er 6 TB. Er der nogen der har best practises for
> hvornår man bør køre RAID 6? Opnår man ikke det samme med RAID 5 med
> hotswap, bare uden performance tab? Næste gang er det 15 x 1TB SATA
> diske vi køber.

Hvis man kører RAID 5 + hotswap og der ryger en disk, vil man køre uden
redundans, mens redundansen genetableres. Med diske på 1 TB kan det tage
et stykke tid, og samtidig vil de tilbageværende diske være ekstra
belastede, og der er derfor en forøget risiko for at endnu en af dem
ryger. Kan man ikke leve med det, kan man bruge RAID 6.

Mvh.

Rasmus

Rasmus Borup Hansen, IT manager      University of Copenhagen
Email: sslug@sslug                Department of Mathematical Sciences
Phone: +45 353 20759                 Universitetsparken 5
Cell phone: +45 287 50759            DK-2100 Ø
Office: 04.2.08                      Denmark




 
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