AMagic AES-S3504UE Instrukcja Użytkownika Pobierz pdf (Strona 10)

It is also possible to create a LARGE volume using only a single hard disk drive connected to Port 1. However, it

is not possible to expand an existing LARGE volume by adding another hard disk drive and still preserve any

existing data on that volume.

2.1.3 CLONE MODE

The CLONE MODE storage policy stores all data in duplicate on separate drives to protect against data loss due

to drive failure. One drive clones the others at all times. Every write operation goes to all drives. CLONE MODE

provides the highest level of data protection for critical data that you cannot afford to lose if a hard drive fails, but

waste the amount of storage capacity because all data must be stored to all drives. The resulting storage capacity

of the virtual CLONE volume will be equivalent to the size of one hard drive (if all drives are the same) or the

smallest of the all drives (if they are different).

If drive fails (Maximum four drives), the CLONE volume is still usable, but it is in a vulnerable state because its

cloned hard drive is inaccessible. When the offline drive comes back online, the appliance begins a rebuild

process immediately one by one (if they are more than one fails) to restore data redundancy. A message appears

in the LED indicator to notify you that a rebuild is in progress.

Although the volume remains available during the rebuild process, the volume is susceptible to data loss through

damage to the remaining drive until redundancy is restored at the end of the rebuild and verification process. Host

access takes precedence over the rebuild process. If you continue to use the CLONE volume during the rebuild,

the rebuild process will take a longer time to complete, and the host data transfer performance will also be

affected.

It is also possible to create a CLONE volume using one hard disk drive connected to Port 1 of the AES-S3504UE,

although no clone will occur until a second hard disk drive is connected to Port 1. With only one hard disk drive

connected, the CLONE volume will be available, although no data protection will be provided until a second hard

disk drive is connected.

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AMagic AES-S3504UE Instrukcja Użytkownika Strona 10