Re: Exadata cell disk erase - disk scrubbing

Yup drop celldisk erase runs in parallel :)

 DROP CELLDISK ALL FLASHDISK ERASE=7pass;

 DROP CELLDISK ALL HARDDISK ERASE=3pass;

Above two commands should handle my requirement.

Thanks for your input!

-Abhishek

On Tue, Jan 24, 2017 at 1:24 AM, Svetoslav Gyurov <softice_at_gmail.com> wrote:

> Hi,
>
> 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.
>
> Regards,
> Sve
>
> On Tue, Jan 24, 2017 at 1:04 AM, <fairlie.rego_at_gmail.com> wrote:
>
>> The commands do it one disk at a time but you can parallelize on all 7
>> cell nodes
>> 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
>> moment
>>
>> Hope that clarifies
>>
>> Sent from my iPhone
>>
>> On 24 Jan 2017, at 11:40 AM, H. Abhishek <authoritydba_at_gmail.com> 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_at_gmail.com>
>> wrote:
>>
>>> 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.
>>>
>>> http://docs.oracle.com/cd/E50790_01/doc/doc.121/e50471/cellc
>>> li.htm#SAGUG20674
>>>
>>> Planning on running
>>>
>>> CellCLI> DROP CELLDISK ALL FLASHDISK ERASE=7pass
>>> CellCLI> DROP CELL ERASE=3pass
>>>
>>> Kind regards,
>>> Abhishek
>>>
>>> On Mon, Jan 23, 2017 at 6:04 PM, <fairlie.rego_at_gmail.com> wrote:
>>>
>>>> Hi
>>>>
>>>> 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
>>>> scrubbed
>>>>
>>>> Thanks
>>>> Fairlie
>>>> Sent from my iPhone
>>>>
>>>> > On 24 Jan 2017, at 9:48 AM, H. Abhishek <authoritydba_at_gmail.com>
>>>> wrote:
>>>> >
>>>> > Howdy Guys!
>>>> >
>>>> > We got to returned our leased old exadata boxes and need to destroy
>>>> all data at the DOD level (7 passes).
>>>> >
>>>> > Oracle says they don't want us to erase more than 2 disks at the same
>>>> time.
>>>> > Their recommendation would take us forever to get out of the box.
>>>> >
>>>> > Has anyone got any experience with this? Especially wiping disks in
>>>> parallel.
>>>> > The guy from Oracle says it consumes a LOT of CPU.
>>>> > I think it should be IO bound. Why does he say that?
>>>> >
>>>> > Thanks!
>>>> > Abhishek
>>>>
>>>
>>>
>>
>

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