Increase device limit

[sambo]

Hello,

 

Possible to increase this 30 disks limit ?

Wanted to "join" my servers with HBA card so that 30 disks limit will be reached quickly

 

 

Thanks

[pwm]

Lots of eggs in the same basket.

One PSU failure and everything is offline.

 

One PSU that fails and produces a severe overvoltage condition and you can have 30+ dead drives.

 

The parity drives gives you better availability - but you still need backup. And backup is much better located on a separate machine. Even better a separate machine at a different location.

 

If it's just a question of unified access, then you can bridge multiple servers where one server is front-end for own disks and for shares on other servers.

[trurl]

Also, instead of more disks to get more capacity, it might be better to replace smaller disks with larger ones. Fewer disks means fewer points of failure, and larger disks often perform better than smaller disks due to increased density.

[MvL]

I think the idea is not bad. You can add chassis with a expander backplane (has a power supply and power board) to a existing server. So add for example a 9207-8e to you existing sever and connect the backplane expander chassis with a SFF-8088 cable. Boom you have 48 drives!

[sambo]

Its less hardware, and less management since only one OS is running.

Both server have redundant psu. But yea each system have his failure states, but i accept those. 

 

[ken-ji]

I personally recommend to use external enclosures. DIY or commercial ones

No need to worry about high power single / redundant PSUs

Not all eggs in the same basket. (but still close together)

I'm using a SAS9206-16e to an expander JBOD enclosure (Areca 4036)