"Roeland M.J. Meyer" wrote:
>
> 100 --> 200 is 100% improvement, but 200 --> 100 is only 50% reduction.
I know. :-D.
--
D. Juan Piernas Cánovas
Departamento de Ingeniería y Tecnología de Computadores
Facultad de Informática. Universidad de Murcia
Campus de Espinardo - 30080 Murcia (SPAIN)
Tel.:
100 --> 200 is 100% improvement, but 200 --> 100 is only 50% reduction.
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> Sent: Monday, July 12, 1999 5:49 AM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: Re: Two que
"Roeland M.J. Meyer" wrote:
>
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Juan Piernas
> > Cánovas
> > Sent: Saturday, July 10, 1999 4:04 PM
> >
> > I have two questions:
> >
> > 1.- Why are RAID-1 writes slower than writes to one of the
> > RAID-1 disks?. Software overhead?. Hardware problems?.
>
I just rolled a patch for linux-2.2.10, but, even though it's less than 100k
compressed, I hesitate to post it to the news group since I am not the official
keeper of the code (nor do I wish to be).
I am currently using a kernel compiled from my patch and it seems to work
fine. I have documented
> [mailto:[EMAIL PROTECTED]]On Behalf Of Juan Piernas
> Cánovas
> Sent: Saturday, July 10, 1999 4:04 PM
>
> I have two questions:
>
> 1.- Why are RAID-1 writes slower than writes to one of the
> RAID-1 disks?. Software overhead?. Hardware problems?.
For every write request, two physical writes ar
Juan Piernas Cánovas wrote/schrieb/scribsit:
> 1.- Why are RAID-1 writes slower than writes to one of the
> RAID-1 disks?. Software overhead?. Hardware problems?.
All data has to be written twice, what, unless someone invents
multicast SCSI, has to happen successively.
Stefan
Hi all!
I have two questions:
1.- Why are RAID-1 writes slower than writes to one of the
RAID-1 disks?. Software overhead?. Hardware problems?.
2.- Why are RAID-1 reads slightly better than reads from one
of the RAID-1 disks?. If a RAID-1 is made up of two disks,
I've got two copies of data and
