The most popular are Fibre Channel and iSCSI, but there are
many others.
Depending on the significance of your hardware investment, a SAN might be peppered
with redundant hardware. There will most likely be disks that sit idle, waiting to be
hot-swapped into a RAID array; redundant power supplies and HBA switches; and so on.
Even entry- and mid-level SANs can have significant redundant systems in place.
SAN hardware generally requires a dedicated individual to act as a storage administrator.
If you don??™t have such an individual in your organization, then you??™ll find it
difficult to ensure that the SAN is configured optimally for your SQL Server storage.
The problem you??™re most likely to run into with a SAN configuration is having all of
the data placed on a single array, without you knowing for certain what type of array it is.
From a performance standpoint, combining as many disks as possible into a single array
is generally best. From a recovery standpoint, that may not be the case. No matter how
much hardware redundancy there may be, there??™s always some single point of failure.
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