"John L Rice" <Drummer (AT) ImJohn (DOT) com> wrote

} >> If they are saying not to have a SAS array and a separate SATA array on
} >> the same controller then I agree with
} >
} >> Frank.
} >
} > Who?
}
} uuhhmm . . . you . . . (seriously, I don't know what the hell I was
} thinking. Did you ever use the name 'Frank'??)

You mean: "Frank" <nospam@ (home of the braindead) mindspring.com>
Neh. As far as my records go the last we saw of him was in 2001.
That brainfart of yours must have spent quite some time in the making.

}
} >> John L Rice
} >
} > Do your brainfarts happen often?
}
} Yeah . . .QUITE often . . it's pretty stinky here . . . . ;~?
}
} Obviously, I'm much more proficient at lurking . . . .

<calypso (AT) fly (DOT) srk.fer.hr.invalid> wrote

That is the biggest load of balloney I've ever heard... This is so wrong I'm
not even going to try a real answer. If you believe that, get out of IT
fast, you're a danger to anything with a plug on it.

Rob

Rob Turk <wipe_this_r.turk (AT) chello (DOT) nl> kenjka:
That's not mine... That's IBM's storage policy AFAIK, they don't mix SATA
and SAS drives in the same case... Why? Ask them, not me, all I know is that
there is a possibility that vibrations of SAS drives can potentially cause
some errors on SATA drives on a long run...


--
"Nezdravs li cetniko umire ?" upita macka njusi Samurajo podmazuje.
"Nisam ja nikog bombardiro !" rece lubenicao mase "Ja samo drotu pipu pedofilanm !" By runf

Damir Lukic, calypso (AT) _MAKNIOVO_fly (DOT) srk.fer.hr
a member of hr.comp.hardver FAQ-team

<calypso (AT) fly (DOT) srk.fer.hr.invalid> wrote

Unless you give me a link where IBM makes the clame that the drives spin in
opposite directions, it's your claim. And it's balloney.

SAS is just an electrical interface and a protocol definition. So is SATA.
So is SCSI. So is PATA. And so is Fibre Channel, ESDI, ST-506, CMD and SSA.
They are not in any way related to which direction the disk spins.

Rob

Andy wrote:

Is there any truth to this? I have a JBOD unit that has all SCSI drives
but some of them are 10K drives and some are 7200's. They have been
running for at least four years without a hitch.

I now have a new 1U server that has two 7200 SATA drives mirrored. It
has two free drive bays and I was planning on putting in two 10K
Raptors. Is this not advised due to differing rotational speed? I can
imagine that harmonic vibration would resonate at some other frequencies
but how does this affect the drives themselves? I'd think it has a lot
to do with the structure that the drives are in and how well vibrations
are damped.

What about fans in these 1U servers? Some of these run at 15K RPM. I'd
imagine they would need to be taken into account too and if this was a
real problem there would be advisories about running certain speed
drives with certain speed fans.

Thanks for any information you can give.

Steve

"Rob Turk" <wipe_this_r.turk (AT) chello (DOT) nl> wrote

SAS was even given the same connector arrangement as SATA so that
SAS and SATA drives drives could both be used in SAS cabinets
(but not in SATA cabinets).

What exactly did you not get in the reactions here to that croat clown.

"Steve Cousins" <steve.cousins (AT) maine (DOT) edu> wrote

<calypso (AT) fly (DOT) srk.fer.hr.invalid> wrote

Ah, now it is IBM's fault that you made a spectacular fool out of yourself.

In other words: you made that up.

Too late, you already answered that for them. It's the spin direction.

But you don't.

Keep up the act, you're quite convincing.

Folkert Rienstra wrote:
I sympathised with most of the reactions which is why I was puzzled by
Andy's message that seemed to give creedence to the argument against
mixing types. Since it is similar to what I have done and plan to do in
the future, I thought I'd ask Andy (and others who might have a thought
about it) what the basis was for the message. I haven't found a
resounding credible source for this information so I'll plan on
continuing the practice. I hope I haven't caused disharmony.

Steve

"Folkert Rienstra" <see_reply-to (AT) myweb (DOT) nl> wrote

I'm developer of the mpt fusion linux driver. Mike, who at LSI told you that you can't mix SAS/SATA drives on the 1068? If your
running mpt fusion (not megaraid), you can mix SATA and SAS on a single controller as long as the devices are configured at single
devices, non-raid. If you create a RAID volume, then it has to all SAS or SATA drives in that raid volume. Since we support two
logical volumes, its possible to have one raid volume as SATA, and the other as SAS. Here is a link to our website containing
documentation on our products

http://www.lsi.com/storage_home/prod...bas/index.html

Eric Moore
LSI Corporation
Eric.Moore (AT) lsi (DOT) com