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Problem Solving | MediaVault 4440 User Manual |
Frequently Asked Questions (FAQs)
TABLE 7-2. Frequently Asked Questions.
What is the proper placement of my | The MV 4440 can be operated in a tower configuration only. |
MediaVault? | Whenever possible, do not place the unit near the floor, as it |
| will pick up more dust. |
What are typical | The internal data rates per vPOD range anywhere from |
| 500MB/sec to about 606MB/sec. Striping the four vPODs |
| together provides a sustained data rate of 1000MB/s. |
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What is striping? | Striping is a technique where different parts, called sectors, of |
| different disk drives are used alternately in sequence. |
| This is done for several possible reasons: a) Gaining |
| performance; b) Increasing reliability; or c) Increasing |
| capacity. |
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What is spanning/concatenation? | This is a technique where hard disk drives are used |
| end, i.e. where one fills up the data continues on to the next. |
| This is strictly done for capacity, and has no gains in either |
| speed or reliability. |
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What is mirroring? | Mirroring is where data, when written, is written to two differ- |
| ent disks or sets of disks |
| This offers reliability, at the cost of capacity and speed. |
What is RAID 0? | In RAID 0, the disk drives are striped with corresponding |
| sectors of other drives, called strips, sequentially. |
| Data written goes to sector 1 of drive 1, then sector 1 of drive |
| 2, and so on. RAID 0 sacrifices data protection to gain |
| capacity and performance. |
| To do RAID 0 requires a minimum of 2 disks. The MV 4440 |
| has four sets of 10 |
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What is RAID 5? | In RAID 5, the sectors of corresponding disk drives form what |
| is called a sector strip. One sector of this strip is used for |
| parity (this sector is alternated to different drives in each strip). |
| Parity is information used to read or recreate missing data in |
| the event that a drive fails. |
MV 4440_Ciprico Inc. |