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>>>>> "Suresh" == Suresh Ramasubramanian <[EMAIL PROTECTED]> writes:
Suresh> On Fri, Jan 13, 2006 at 05:00:19AM -0800, Mithun
Suresh> Bhattacharya wrote:
>> If my understanding is correct a simple NAS is: 1. A storage
>> space available over the network 2. Fault tolerant
>> 3. Expandable 4. Transparent 5. Compatible across OSes
Suresh> add
Suresh> 1. rack space costs (NAS / SAN devices typically have far
Suresh> lower form factor than if you try to run a bunch of
Suresh> fileservers across to a datacenter)
Suresh> 2. out of the box and just works - most of the time. you
Suresh> dont have to sacrifice white chickens and mutter
Suresh> incantations all the time like you would with a homecooked
Suresh> solution
Suresh> 3. hot swappable modules in your NAS / SAN
Suresh> 4. lots and lots more redundancy and failover built in
Suresh> 5. A SLA with your vendor that you can enforce if things
Suresh> turn out bad
Add:
6. Dual hot-swappable power supplies in the disk enclosure.
7. Dual SCSI paths to the enclosure with dual-ported drives inside.
High availability mandates no single point of failure, so you want to
make sure that your shared disk enclosure doesn't become the
bottleneck.
BTW, the correct term is ``High Availability''; ``Fault tolerant'' is
only achievable by spending crores upon crores.
Regards,
- -- Raju
- --
Raj Mathur [EMAIL PROTECTED] http://kandalaya.org/
GPG: 78D4 FC67 367F 40E2 0DD5 0FEF C968 D0EF CC68 D17F
It is the mind that moves
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