User Manual

566
Vess R2000 Series Product Manual Promise Technologies
rAid 60 – striPing Of dOuble PArity
RAID 60 combines both RAID 6 and RAID 0 features. Data is striped across disks as in RAID 0, and it uses
double distributed parity as in RAID 6. RAID 60 provides data reliability, good overall performance and supports
larger volume sizes.
The total capacity of a RAID 60 logical drive is the smallest physical drive times the number of physical drives,
minus four.
RAID 60 also provides very high reliability because data is still available even if multiple physical drives fail (two
in each axle). The greater the number of axles, the greater the number of physical drives that can fail without
the RAID 60 logical drive going ofine.
Advantages Disadvantages
•
HighReaddatatransactionrate
• MediumWritedatatransactionrate
• Goodaggregatetransferrate
• SafestRAIDlevel
• Highdiskoverhead–equivalentoftwo
drivesusedforparity
• SlightlylowerperformancethanRAID50
RAID 60 is a combinaon of RAID 6 and RAID 0
Physical Drives
Data
Stripes
Axle 1
Axle 2