Its a normal HD i guess 4096 is ok,
but i do not think that this matters.


Am 23.06.22 um 13:11 schrieb Rich W:
> Hi,
>
> A blocksize of 1G seems extreme.
> What is the optimal blocksize of the output device?
>
> Cheers,
> -Rich
>
>
> On Thu, Jun 23, 2022, 4:52 AM Radisson via Dng <dng@???> wrote:
>
>> Hi list,
>> i found a strange ext4 (?) effect.
>>
>> when i write to a disk:
>> dd if=/dev/zero of=xx bs=1G count=1
>>
>> reports 2.6 GB (expected)
>> doing again speed drops to 200MB.
>>
>> removing xx restores old speed.
>>
>> I ask the net and it seems that the effect is there
>> since kernel 2.6. I found the explainations a bit confusing.
>>
>> does anyone know more ?
>>
>> note: i was analysing a performace issue for mysql and i am
>> not sure if that problems matters outside tests.
>>
>> re
>> rp
>>
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>