Raid 0+1 array implications...

[Ion Control]

Using "Intel Matrix Storage", I have set up a RAID 0+1 array on 2
HDD's. Volume 0 = RAID0 and has Windows plus regularly used programs.
Volume 1 = RAID1 and holds the larger programs (that take a long time
to install and update) as well as pictures, media, etc. Volume 1 is
divided into two primary partitions.

This may all seem bacwards, but I want Windows to have the speed boost
and have the data backup on the larger programs and the media.

Now, this may be the wrong question for this forum (if so, please
redirect me), but...

Assuming the OS crashes and the RAID1 is destroyed, will the RAID0
remain safe? I assume I would just trash the RAID0, rebuild and
reinstall and then, upon booting, the system would recognize the RAID1
and all my files would be safe. The RAID array is hardware, but
Intel's system allows the comhination of 0 & 1 w/ only two HDD's.

Thanks for your input and let me know if you need more info (or if I
should go elsewhere)...

 

[Guest]

Thier is no RAID set up like you describe....RAID is either in 0 or 1
configuration
when two drives are set up together.Plus,you need to install xp in the RAID
configuration,then in xp only one of the drives is even visable to you,you
simply
can't edit one or the other drives,its impossible.You may believe you set
up RAID
0+1,but actually neither are a active RAID configuration....

 

[Ken Blake, MVP]

Thier is no RAID set up like you describe....RAID is either in 0 or 1
configuration

Thus saith Andrew E., our resident provider of Windows XP misinformation.

Raid comes in several different configurations, far more than just 0 or 1.
Level 0+1, a mirror of stripes, *is* one of the many possible
configurations. See, for example,
http://www.webopedia.com/TERM/R/RAID.html, or many other sites which will
give you similar information.

 

[Bill]

Wrong! Its simply impossible to setup Raid 0 AND a Raid 1 using only 2
drives.

 

[Ken Blake, MVP]

Wrong! Its simply impossible to setup Raid 0 AND a Raid 1 using only 2
drives.

True, but irrelevant. I said nothing about how many drives are required.
Andrew E. said "Thier is no RAID set up like you describe....RAID is either
in 0 or 1 configuration." That statement is completelly false, as I pointed
out.

--
Ken Blake - Microsoft MVP Windows: Shell/User
Please reply to the newsgroup

 

[jt3]

I seem to recall figuring that UDMA 100 was close to saturating the PCI bus,
and so am I missing something about all this RAID striping stuff for extra
speed?

 

[Shenan Stanley]

I seem to recall figuring that UDMA 100 was close to saturating the
PCI bus, and so am I missing something about all this RAID striping
stuff for extra speed?

PCI Express?

 

[Jeff Barnett]

Using "Intel Matrix Storage", I have set up a RAID 0+1 array on 2
HDD's. Volume 0 = RAID0 and has Windows plus regularly used programs.
Volume 1 = RAID1 and holds the larger programs (that take a long time
to install and update) as well as pictures, media, etc. Volume 1 is
divided into two primary partitions.

This may all seem bacwards, but I want Windows to have the speed boost
and have the data backup on the larger programs and the media.

Now, this may be the wrong question for this forum (if so, please
redirect me), but...

Assuming the OS crashes and the RAID1 is destroyed, will the RAID0
remain safe? I assume I would just trash the RAID0, rebuild and
reinstall and then, upon booting, the system would recognize the RAID1
and all my files would be safe. The RAID array is hardware, but
Intel's system allows the comhination of 0 & 1 w/ only two HDD's.

Thanks for your input and let me know if you need more info (or if I
should go elsewhere)...

You will see a lot of posts saying there is no 0+1 Raid setup. As you
know from reading the Intel blurbs, such an animal exists. They
accomplish this stunt with a combination or hardware and software. As to
your original question: if the Raid 1 portion of one of the disks is
hit, there will be an automatic rebuild. That is what a Raid one does.
If both portions are hit, the Raid 1 is lost. Note that your two disks
are broken into two pieces each. One piece on each makes the Raid 0
while the others make the Raid 1. It is possible for a head to crash
(for example) on one of the disks to destroy the usefulness of both
(depends on details). A better place to ask a specific question, in your
case, is Intel support. In the first place they know that Raid 0+1 is
possible and works. In the second place, they know the details of there
own hardware and software better than anybody else.

-- Jeff Barnett

 

[Frank]

Using "Intel Matrix Storage", I have set up a RAID 0+1 array on 2
HDD's. Volume 0 = RAID0 and has Windows plus regularly used programs.
Volume 1 = RAID1 and holds the larger programs (that take a long time
to install and update) as well as pictures, media, etc. Volume 1 is
divided into two primary partitions.

This may all seem bacwards, but I want Windows to have the speed boost
and have the data backup on the larger programs and the media.

Now, this may be the wrong question for this forum (if so, please
redirect me), but...

Assuming the OS crashes and the RAID1 is destroyed, will the RAID0
remain safe? I assume I would just trash the RAID0, rebuild and
reinstall and then, upon booting, the system would recognize the RAID1
and all my files would be safe. The RAID array is hardware, but
Intel's system allows the comhination of 0 & 1 w/ only two HDD's.

Thanks for your input and let me know if you need more info (or if I
should go elsewhere)...

Volume 0 does not equal RAID0 etc
RAID 0 needs two qualifying HDDS
RAID 1 needs two qualifying HDDS
RAID 0+1 needs a qualifying RAID controller (eg 4 ports)
using 4 qualifying HDDS