You can erase a single cell disk as well as *ALL disks in parallel*, it
doesn't have to be disk by disk, this is very well documented in the link
you provided ? Since the ERASE is per cell you can run it in parallel
across all cells - login to each cell and run the drop command. Keep in
mind the following:
*When dropping all cell disks using the 1pass or 3pass option, it necessary
to drop the flash disks first using the 7pass option, and then drop the
cell disks. *
You also got the timings in the documentation i.e. how long it will take
depending on the disk size and number of erase passes.
Is the oracle guy technical or sales ? Next time he says something like
this - point him to the documentation.
On Tue, Jan 24, 2017 at 1:04 AM, <fairlie.rego@xxxxxxxxx> wrote:
The commands do it one disk at a time but you can parallelize on all 7
Disk size was 600 gb (Old HP disks)
You need to use dcli and run the commands
on all storage nodes at the same time
I am not infront of a system to be able to dig out the commands at the
Hope that clarifies
Sent from my iPhone
On 24 Jan 2017, at 11:40 AM, H. Abhishek <authoritydba@xxxxxxxxx> wrote:
But I don't think it would erase disks in parallel. So I might want to do
1 disk at a time maybe?
On Mon, Jan 23, 2017 at 6:39 PM, H. Abhishek <authoritydba@xxxxxxxxx>
Thanks for the heads up.
My main question is regarding running them in parallel. Sorry, if it
wasn't very clear.
Do you know what size your disks were?
We have a time constraint. Need to get off the gear ASAP! 😐
I can push it to the limit and don't even mind of the system blows 😂
It would be great if you could recollect the commands from your notes.
I am planning to do a 7 pass on flash disks and 3 pass on physical disks.
Planning on running
CellCLI> DROP CELLDISK ALL FLASHDISK ERASE=7pass
CellCLI> DROP CELL ERASE=3pass
On Mon, Jan 23, 2017 at 6:04 PM, <fairlie.rego@xxxxxxxxx> wrote:
I have done a 7 pass erase on a half rack V2 which took about 8 hours.
1 hour for the flash disks and 7 for the cell disks. I am unsure why
resource usage is a concern when you are decommissioning the kit.(you
obviously do not have any apps running on the kit)
Please note that any grid disks which are inactive/offline will not be
Sent from my iPhone
On 24 Jan 2017, at 9:48 AM, H. Abhishek <authoritydba@xxxxxxxxx>wrote:
all data at the DOD level (7 passes).
We got to returned our leased old exadata boxes and need to destroy
Oracle says they don't want us to erase more than 2 disks at the same
Their recommendation would take us forever to get out of the box.parallel.
Has anyone got any experience with this? Especially wiping disks in
The guy from Oracle says it consumes a LOT of CPU.
I think it should be IO bound. Why does he say that?