SATA RAID?

raid0 = striping. 1 segmant of data is writen to disk1, another to disk2 -
performance mode. however, if 1 HDD goes down, then all data is lost.
i`m lead to beleive that you can have more than 2 disks on this setup (the
silicon image sil3112 manual example is across 3 disks)

raid1 = mirroring. data is written to disc1, and also to disk2. there
IDENTICAL. this is stability/safety mode. if one HDD goes down, then the
raid controller will switch to disk2 and resume as normal with no data loss.

raid 0+1 = i`m not sure how it does it, but it's a combination of the above.
BOTH striping and mirroring on the same setup. for speed aswell as data
security.

multiple raid - not heard of. but i`m guessing it supports more than 1 raid
array.

i`m running SATA RAID0 array, and so far (3 weeks now) all is good. no data
corruption, loss, pauses or anything negative. just 71mb/s rather than the
30mb/s i was running before on an ATA133 maxtor

tim
"Tai Tze Hou (Alvin)" <t.DeleteThis@verizon.net> wrote in message
news:B8Ajb.17257$zw4.16659@nwrdny01.gnilink.net...
 > Hi,
 >
 > the specification on a motherboard for Serial ATA: RAID 0, RAID 1, RAID
O+1,
 > Multiple RAID.
 >
 > What does the different RAID stands for and what does it do?
 >
 > Thanks.
 >
 > Al
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: SATA RAID? 

Thank you.


"Tai Tze Hou (Alvin)" <t RemoveThis @verizon.net> wrote in message
news:B8Ajb.17257$zw4.16659@nwrdny01.gnilink.net...
 > Hi,
 >
 > the specification on a motherboard for Serial ATA: RAID 0, RAID 1, RAID
O+1,
 > Multiple RAID.
 >
 > What does the different RAID stands for and what does it do?
 >
 > Thanks.
 >
 > Al
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: SATA RAID? 

 >
 > raid 0+1 = i`m not sure how it does it, but it's a combination of the
 > above. BOTH striping and mirroring on the same setup. for speed
 > aswell as data security.
 >

ya it means 2 drives are striped, and another 2 are a mirror for the first
too

also, there is a botched standard raid 1.5 (or something like that)
by some company i can't rememeber, you get both mirroring and striping
using 2 drives, basicly same as a normal mirror, but when reading data,
instead of using the primary drive, it reads first bit from drive 1, then
bit 2 from drive 2, so as it get the striping bit

it's more complicated than that, but thats the basic idea, i forget which
company does makes em, the review i read wasn't that impressed really<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: SATA RAID? 

"Tai Tze Hou (Alvin)" <t RemoveThis @verizon.net> wrote in message
news:B8Ajb.17257$zw4.16659@nwrdny01.gnilink.net...
 > Hi,
 >
 > the specification on a motherboard for Serial ATA: RAID 0, RAID 1, RAID
O+1,
 > Multiple RAID.
 >
 > What does the different RAID stands for and what does it do?

I'm not all that familiar with RAID arrays but a quick google for 'raid
configurations' I can only find reference to three types of RAID.

See: <a style='text-decoration: underline;' href="http://www.linkcomputers.com/uraidsconf.html" target="_blank">http://www.linkcomputers.com/uraidsconf.html</a> for an example.

How many SATA controllers does your board support? I would have thought RAID
0+1 would be similar to RAID 5 but that requires at least three controllers
and three drives, say two 80GBs and one 160GB. It stripes to the 80s (in
this example) and mirrors to the 160 for both speed and data security.
--
~misfit~


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 >> Stay informed about: SATA RAID? 

~misfit~ wrote:
 > "Tai Tze Hou (Alvin)" <t.TakeThisOut@verizon.net> wrote in message
 > news:B8Ajb.17257$zw4.16659@nwrdny01.gnilink.net...
 >
  >>Hi,
  >>
  >>the specification on a motherboard for Serial ATA: RAID 0, RAID 1, RAID
 >
 > O+1,
 >
  >>Multiple RAID.
  >>
  >>What does the different RAID stands for and what does it do?
 >
 >
 > I'm not all that familiar with RAID arrays but a quick google for 'raid
 > configurations' I can only find reference to three types of RAID.
 >
 > See: <a style='text-decoration: underline;' href="http://www.linkcomputers.com/uraidsconf.html" target="_blank">http://www.linkcomputers.com/uraidsconf.html</a> for an example.
 >
 > How many SATA controllers does your board support? I would have thought RAID
 > 0+1 would be similar to RAID 5 but that requires at least three controllers
 > and three drives, say two 80GBs and one 160GB. It stripes to the 80s (in
 > this example) and mirrors to the 160 for both speed and data security.

That's not how RAID 5 works. RAID 5 stripes all the (equal sized) drives
with data and error correction coding (e.g. parity). Data and the ECC are
stripe rotated among the three (can be more) drives to spread the wear and
tear equally among them.

Data can be recovered with any two of the three.

Conceptually it looks like

Disk 1 Disk 2 Disk 3

data1 data2 ecc
ecc data3 data4
data5 ecc data6
data7 data8 ecc
..
..
..<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: SATA RAID? 

"atwifa" <atwifa@'fsmail'.net> wrote in message
news:bmmou1$us8$1@newsreaderm1.core.theplanet.net...
<font color=purple> > <a style='text-decoration: underline;' href="http://www.hardwarecentral.com/hardwarecentral/reviews/1611/1/</font" target="_blank">http://www.hardwarecentral.com/hardwarecentral/reviews/1611/1/</font</a>>

Good info, I should have read further before speculating in my previous
post.

Thanks, that's what I like about newsgroups. We can all learn form one
person's question. I'm surprised the OP's mobo supports RAID 0+1 as that
requires at least four SATA channels and most SATA mobos only have two.

Cheers,
--
~misfit~


---
Outgoing mail is certified Virus Free.
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 >> Stay informed about: SATA RAID? 

well ... 2 channel RAID would support up to 4 drives


"~misfit~" <~misfit~@his-desk.com> wrote in message
news:OGDjb.180792$JA5.4527630@news.xtra.co.nz...
 >
 > "atwifa" <atwifa@'fsmail'.net> wrote in message
 > news:bmmou1$us8$1@newsreaderm1.core.theplanet.net...
<font color=green>  > > <a style='text-decoration: underline;' href="http://www.hardwarecentral.com/hardwarecentral/reviews/1611/1/</font" target="_blank">http://www.hardwarecentral.com/hardwarecentral/reviews/1611/1/</font</a>>
 >
 > Good info, I should have read further before speculating in my previous
 > post.
 >
 > Thanks, that's what I like about newsgroups. We can all learn form one
 > person's question. I'm surprised the OP's mobo supports RAID 0+1 as that
 > requires at least four SATA channels and most SATA mobos only have two.
 >
 > Cheers,
 > --
 > ~misfit~
 >
 >
 > ---
 > Outgoing mail is certified Virus Free.
 > Checked by AVG anti-virus system (http://www.grisoft.com).
 > Version: 6.0.525 / Virus Database: 322 - Release Date: 9/10/2003
 >
 ><!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: SATA RAID? 

"Frank Weston" <frank.DeleteThis@weston-american.com> wrote in message
news:qqCdnbr8f_L9ehOiRVn-vA@comcast.com...
<font color=purple> > <a style='text-decoration: underline;' href="http://www.linktionary.com/r/raid.html</font" target="_blank">http://www.linktionary.com/r/raid.html</font</a>>

Except that site uses the wrong definition for RAID. They say "Redundant
Array of *Inexpensive* Disks" when, in fact it should be "Independant". I
have written the web-master about it.
--
~misfit~


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Outgoing mail is certified Virus Free.
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 >> Stay informed about: SATA RAID? 

On Fri, 17 Oct 2003 11:05:52 +1300, "~misfit~" <~misfit~@his-desk.com>
wrote:

 >
 >"Frank Weston" <frank.TakeThisOut@weston-american.com> wrote in message
 >news:qqCdnbr8f_L9ehOiRVn-vA@comcast.com...
<font color=green>  >> <a style='text-decoration: underline;' href="http://www.linktionary.com/r/raid.html</font" target="_blank">http://www.linktionary.com/r/raid.html</font</a>>
 >
 >Except that site uses the wrong definition for RAID. They say "Redundant
 >Array of *Inexpensive* Disks" when, in fact it should be "Independant". I
 >have written the web-master about it.

The original was "Inexpensive", which it was when it was developed (they
were competing against mainframe arrays at the time). Was changed once the
prices caught up so that now Independant makes more sense.<!-- ~MESSAGE_AFTER~ -->
 >> Stay informed about: SATA RAID? 

"atwifa" <atwifa@'fsmail'.net> wrote in message
news:bmn2fl$pbq$1@newsreaderg1.core.theplanet.net...
 > well ... 2 channel RAID would support up to 4 drives

Not true. SATA only supports one drive per channel.
--
~misfit~

 > "~misfit~" <~misfit~@his-desk.com> wrote in message
 > news:OGDjb.180792$JA5.4527630@news.xtra.co.nz...
  > >
  > > "atwifa" <atwifa@'fsmail'.net> wrote in message
  > > news:bmmou1$us8$1@newsreaderm1.core.theplanet.net...
<font color=brown>   > > > <a style='text-decoration: underline;' href="http://www.hardwarecentral.com/hardwarecentral/reviews/1611/1/</font" target="_blank">http://www.hardwarecentral.com/hardwarecentral/reviews/1611/1/</font</a>>
  > >
  > > Good info, I should have read further before speculating in my previous
  > > post.
  > >
  > > Thanks, that's what I like about newsgroups. We can all learn form one
  > > person's question. I'm surprised the OP's mobo supports RAID 0+1 as that
  > > requires at least four SATA channels and most SATA mobos only have two.
  > >
  > > Cheers,
  > > --
  > > ~misfit~
  > >
  > >
  > > ---
  > > Outgoing mail is certified Virus Free.
  > > Checked by AVG anti-virus system (http://www.grisoft.com).
  > > Version: 6.0.525 / Virus Database: 322 - Release Date: 9/10/2003
  > >
  > >
 >
 >


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 >> Stay informed about: SATA RAID? 

sorry, yeah. for some reason i thought we were talking about reg'lar ide
channels
 >> Stay informed about: SATA RAID? 

"JT" <datacare@www> wrote in message
news:5f2872d095ffbebdad5147eb20969690@news.teranews.com...
 > On Fri, 17 Oct 2003 11:05:52 +1300, "~misfit~" <~misfit~@his-desk.com>
 > wrote:
 >
  > >
  > >"Frank Weston" <frank.RemoveThis@weston-american.com> wrote in message
  > >news:qqCdnbr8f_L9ehOiRVn-vA@comcast.com...
<font color=brown>   > >> <a style='text-decoration: underline;' href="http://www.linktionary.com/r/raid.html</font" target="_blank">http://www.linktionary.com/r/raid.html</font</a>>
  > >
  > >Except that site uses the wrong definition for RAID. They say "Redundant
  > >Array of *Inexpensive* Disks" when, in fact it should be "Independant". I
  > >have written the web-master about it.
 >
 > The original was "Inexpensive", which it was when it was developed (they
 > were competing against mainframe arrays at the time). Was changed once the
 > prices caught up so that now Independant makes more sense.

You sure? Do you have corroborating evidence? I'm not being a smart-arse, I
really want to know. Just about every definition I've seen says
*Independant*, that was the point of it, all your data was shared between
disks, not all on the one.
--
~misfit~


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 >> Stay informed about: SATA RAID?