NAS is more than just general centralized data storage provided to users in environments with large amounts of data. NAS provides simpler and low cost systems for load-balancing and fault-tolerant file, email and web server systems. NAS comes in various options differing in interface and type of drives, which mostly works on “NFS, SMB or CIFS” based file storage methods and has either SATA or SCSI drives in RAID array.
Whereas SAN is referred to as Enterprise storage, it connects remote targets such as disk drives, tape drives on a network for block level I/O, also it uses Fibre and iSCSI protocols for the transfer of data over network which provides the fastest data transfer rates.
We gather valuable information about the NAS or SAN boxes, such as:
There is much more complexity involved besides the points mentioned above, which is tackled with other in-house developed techniques. Once everything goes well data is recovered to the expectation and is delivered to you on choice of your media.
|Failure of RAID controller or change in the RAID|
|Two or more hard drives fail or go offline|
|Server crashes and fails to mount volumes / partitions|
|Addition of incompatible hard drives to the array|
|Hardware / Software malfunction|
|Virus infection, software and operating system upgrades|
|RAID 0 – Stripe Set without parity|
|RAID 1 – Mirroring / Duplexing|
|RAID 5 – Stripe Set with parity|
|Other RAID combinations such as RAID|
|0 +1, RAID 5+0, RAID 5+1 etc.|