[Info-vax] The Future of Server Hardware?

[Jan-Erik Soderholm]

glen herrmannsfeldt wrote 2012-10-04 20:03:
> Johnny Billquist <bqt at softjar.se> wrote:
>
> (snip, I wrote)
>>> For many years, 3600 RPM disks have been common, so 8.33ms average
>>> rotational delay. For servers, now, 7200RPM might be more usual,
>>> ro 4.16ms. A million instructions doesn't sound far off.
>
>> 3600 rpm? I didn't even know you could find that anymore. I thought the
>> standard for any cheap home PC was 7200 RPM.
>
> For current model Seagate, from the seagate.com web site, and
> for desktop (presumably 3.5in) drives, the choices seem to be
> 5900RPM and 7200RPM. For laptop drives, 5400 and 7200RPM.
> (Maybe the 5900 is a typo.)  Western Digital has a green
> (for eco-computing) line which doesn't indicate the RPM
> (at says intellipower) but which some sites claim as 5400.
>
> Looks to me like 5400 is usual for cheaper or more power
> efficient home PCs and 7200 for more expensive ones.
>
>> For people who really care
>> about performance, and have money, 15.000 RPM is common, and I think you
>> can also find 18.000 RPM. However, I guess that market is now going for
>> SSD instead.
>
> I am usually a little behind the curve. I believe the fastest
> that I have seen (not just read about) is 10,000RPM.

We had 10K drives 10-15 years ago in the blue StorageWorks systems.

Today I have 15K drives in my DS25 hobbyist system. Also "old"
disks that fails now and then.

Jan-Erik.