Hp smart array - increase capacity

Hi all,

Have a hp proliant dl380 G6 with a smart array p410 and 8 drive bays.

Os volume is raid 1 using 2 bays.
Data volume is raid 5 using 6 bays.

The data volume is at capacity and I need to increase it but obviously there's no free bays left. All disks are 145gb sas.  

Can I, one by one and waiting until the array has rebuilt after each swap, swap the disks for 300gb sas disks?
Will the smart array see the extra space after all disks have been replaced with the bigger ones?

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RAID 5 does not work like that.  If you put a 600GB in there it will become a 145GB.
tech53Author Commented:
Yeah I know, but my point is that after all disks have been swapped, will the array controller see the extra space and allow me to allocate it?
tech53Author Commented:
I mean, I know that on a single disk swap to a larger capacity disk, the controller will only use the capacity of the previous disk and the rest is not usable. The controller will even tell you that. But when all disks are upgraded with larger ones, the same amount of free disk space will be available across the array.
So I was wondering if the controller would be smart enough to recognise this and allow the space to be allocated.
Yes, once all drives in the array are the same size, you should see the additional space in the ACU. However, it will take a long time to expand. HP says typically 15 minutes per GB.

The quicker way to do it is to create a full backup of the drive, destroy the array, re-create with the new size, then restore the data. Just throwing that out there. It has a little bit of down time, but it may be better than several hours of reduced performance.

Don't forget to mark as accepted solution if you approve. :-)

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One caveat, once you have replaced one by one and see a larger array you will require a cache battery in order to extend any logical disk, although yo can create a new logical disk without that. You also have the option to add a 2nd drive cage to that server although it requires a 2nd RAID controller or the SAS expansion card to be fitted also.

(it's quite a bit faster than 15 mins per GB nowadays, but it will take several hours to rebuild each disk during which time you will have no parity and there is always the option of rebuild failing due to bad blocks.
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