Thursday, August 11, 2022

Re: dump(8) is slow

On 2022-08-10, Tomasz Rola <rtomek@ceti.pl> wrote:

>> DUMP: Date this dump completed: Tue Aug 9 13:51:01 2022
>> DUMP: Average transfer rate: 36530 KB/s
>>
>> That is far below the read-write speed of a modern SATA drive.
>
> Ok. But what is a theoretic speed limit for this device?

The data sheet claims 237 MB/s typical sustained transfer rate.

# dd if=/dev/rsd0c of=/dev/null bs=64k count=1m
1048576+0 records in
1048576+0 records out
68719476736 bytes transferred in 270.039 secs (254479653 bytes/sec)

--
Christian "naddy" Weisgerber naddy@mips.inka.de

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