You can turn on write back caching if you have a UPS as well
(provided your UPS is wired into your system for a graceful shutdown)
Hopefully you have a redundant PS unit. Having a UPS is not going to
help if your PS fails.
That's a very good point never thought of that. Acrtually this
You can turn on write back caching if you have a UPS as well
(provided your UPS is wired into your system for a graceful shutdown)
Hopefully you have a redundant PS unit. Having a UPS is not going to
help if your PS fails.
redundant power supplies connected to redundant UPS's.
will only work with
another identical HW RAID card.
-Ross
- Original Message -
From: [EMAIL PROTECTED] [EMAIL PROTECTED]
To: CentOS mailing list centos@centos.org
Sent: Fri Mar 14 09:08:39 2008
Subject: RE: [CentOS] Recommendations for a “real RAID 1 card on Centos box
You can turn
: [CentOS] Recommendations for a “real RAID 1 card on Centos box
That is true, buy high quality stuff up front for fewer problems down
the road. Not a sure bet, but a better one. In the half dozen systems
I've been running at home for the past several years none of them
have suffered
That's a very good point never thought of that. Acrtually this RAID 1 setup
I'm planning
is for my desktop machine, problem is is's not built like a server so there
is not the traditional
slid in bay for a second PS as do many 1 and 2u rack servers have. Unless
there is some
You can turn on write back caching if you have a UPS as well
(provided your UPS is wired into your system for a graceful shutdown)
Hopefully you have a redundant PS unit. Having a UPS is not going to
help if your PS fails.
That's a very good point never thought of that.
This is getting OT and you are going to end up spending
more on redundancy then if you just called Dell and ordered
another computer.
I agree with you in that it's cheaper to buy another home
computer than to design a system with redundancy.
However that new conputer I would order
You are definitely making your life more difficult then is needed for a
desktop machine.
You said you have 4 hard disks. Make a software RAID1 out of the first two.
Make a software RAID1 out of the second two and your good to go.
You can use dump/restore to backup the logical volumes
Therese Trudeau wrote:
This is getting OT and you are going to end up spending
more on redundancy then if you just called Dell and ordered
another computer.
I agree with you in that it's cheaper to buy another home
computer than to design a system with redundancy.
However that
Date: Fri, 14 Mar 2008 10:33:29 -0400
You are definitely making your life more difficult then is needed for a
desktop machine.
You said you have 4 hard disks. Make a software RAID1 out of the first two.
Make a software RAID1 out of the second two and your good to go.
You can use
No, read this:
my previous thread...
Sorry, I can't access your Windows Live Hotmail inbox . . .
Ah haha sorry was not paying attention, it's here: :)
http://lists.centos.org/pipermail/centos/2008-March/096054.html
_
Sorry, I can't access your Windows Live Hotmail inbox . . .
Ah haha sorry was not paying attention, it's here: :)
http://lists.centos.org/pipermail/centos/2008-March/096054.html
OOPS - I need some more coffee this am - HERE is the correct thread:
I have two home workstation machines.
One is Centos, and one is Windows (the one I use Adobe on). I'd prefer if
possible
to have the same type of RAID cards on both machines, because easier to
manage and if I ever decide to sell or give away one machine, I can pull
the raid card and use
Therese Trudeau wrote:
I have two home workstation machines.
One is Centos, and one is Windows (the one I use Adobe on). I'd prefer if
possible
to have the same type of RAID cards on both machines, because easier to
manage and if I ever decide to sell or give away one machine, I can pull
the
Therese Trudeau wrote:
That brings up a last question on possiblity of either a
3ware or acrea RAID 1 cards. I'm wondering how long I would
be able to order
a replacement RAID card from either of 3ware or areea.
Anyone know if 3ware or acrea stock identical replacement
cards
Unfortunately I can't use software RAID1 because of this:
http://lists.centos.org/pipermail/centos/2008-March/096063.html
First, you should probably get your applications from a company that
doesn't hate its customers... But aside from that, this restriction
should only apply to the
Ross S. W. Walker wrote:
Don't bother. If you are a serious Adobe designer get
yourself a Mac and dual boot it between OS X and CentOS or
triple with Windows.
Or use parallels or vmware and run all 3 at once when you want... and
let the built in time machine tool do backups to an external
Subject: RE: [CentOS] Recommendations for a real RAID 1 card on Centos box
Unfortunately I can't use software RAID1 because of this:
http://lists.centos.org/pipermail/centos/2008-March/096063.html
First, you should probably get your applications from a company that
doesn't hate its
Les Mikesell wrote:
Ross S. W. Walker wrote:
Don't bother. If you are a serious Adobe designer get
yourself a Mac and dual boot it between OS X and CentOS or
triple with Windows.
Or use parallels or vmware and run all 3 at once when you want... and
let the built in time machine
Ah I figured someone would ask that. I use pretty much all
major adobe products, Photoshop, Illustrator, Flash, just
about the entire suite.
I have two home workstation machines. One is Centos, and one
is Windows (the one I use Adobe on). I'd prefer if possible
to have the same type
Ross S. W. Walker wrote:
Les Mikesell wrote:
Ross S. W. Walker wrote:
Don't bother. If you are a serious Adobe designer get
yourself a Mac and dual boot it between OS X and CentOS or
triple with Windows.
Or use parallels or vmware and run all 3 at once when you want... and
let the built in
Therese Trudeau wrote:
Ah I figured someone would ask that. I use pretty much all
major adobe products, Photoshop, Illustrator, Flash, just
about the entire suite.
I have two home workstation machines. One is Centos, and one
is Windows (the one I use Adobe on). I'd prefer if
Don't bother. If you are a serious Adobe designer get
yourself a Mac and dual boot it between OS X and CentOS or
triple with Windows.
Or use parallels or vmware and run all 3 at once when you want... and
let the built in time machine tool do backups to an external firewire or
network
If you are a graphic designer, I'm curious what you use the
CentOS box for (or why you use Windows and not Mac :-)
Good question when I started out I had windows so that's
what I bought - Adobe windows versions. I'm considering
migrating to Mac though because Adobe just started a
new
Therese Trudeau wrote:
Don't bother. If you are a serious Adobe designer get
yourself a Mac and dual boot it between OS X and CentOS or
triple with Windows.
Or use parallels or vmware and run all 3 at once when you want... and
let the built in time machine tool do backups to an external
Therese Trudeau wrote:
Don't bother. If you are a serious Adobe designer get
yourself a Mac and dual boot it between OS X and CentOS or
triple with Windows.
Or use parallels or vmware and run all 3 at once when you want... and
let the built in time machine tool do backups to an external
On Mon, Mar 10, 2008 at 12:17:29AM -0400, Therese Trudeau enlightened us:
Ah great i'll check out the URL thanks.
One thing, an earlier poster reccomended RAID 5 instead of RAID 1. I guess
if one only has 2 drives RAID 1 is the way to go but if I have 4 drives he
said go with RAID 5 over
Karanbir Singh wrote:
Therese Trudeau wrote:
I'm just really looking for a RAID card that will do RAID 1, with four
drive capacity, i.e.,
a master drive with the OS and applications installed and mirrored, and a
slave drive for data and
photos, graphic design, video, etc also mirrored. What
Therese Trudeau wrote:
Ah great i'll check out the URL thanks.
One thing, an earlier poster reccomended RAID 5 instead of RAID 1.
I guess if one only has 2 drives RAID 1 is the way to go but if I have 4
drives he said go with
RAID 5 over RAID 1. Isn't RAID 1 mirroring a better solution
nate wrote:
Therese Trudeau wrote:
Ah great i'll check out the URL thanks.
One thing, an earlier poster reccomended RAID 5 instead of RAID 1.
I guess if one only has 2 drives RAID 1 is the way to go but if I have 4
drives he said go with
RAID 5 over RAID 1. Isn't RAID 1
nate wrote
the whole point of a BBU is that you can turn on write back caching -
and get a fair win in write performance on regular tasks.
You can turn on write back caching if you have a UPS as well
(provided your UPS is wired into your system for a graceful shutdown)
UPS isnt going to help
On 3/10/08, nate [EMAIL PROTECTED] wrote:
You can turn on write back caching if you have a UPS as well
(provided your UPS is wired into your system for a graceful shutdown)
Hopefully you have a redundant PS unit. Having a UPS is not going to
help if your PS fails.
--
Robert Arkiletian
Eric
Robert Arkiletian wrote:
On 3/10/08, nate [EMAIL PROTECTED] wrote:
You can turn on write back caching if you have a UPS as well
(provided your UPS is wired into your system for a graceful shutdown)
Hopefully you have a redundant PS unit. Having a UPS is not going to
help if your PS
Robert Arkiletian wrote:
On 3/10/08, nate [EMAIL PROTECTED] wrote:
You can turn on write back caching if you have a UPS as well
(provided your UPS is wired into your system for a graceful shutdown)
Hopefully you have a redundant PS unit. Having a UPS is not going to
help if your PS fails.
Therese Trudeau wrote:
Do such cards exist? If so which model /manufacturers do you recommend?
Any experiences/info/insights on hardware RAID cards good or bad on centos
boxes would be appreciated.
3Ware 8000-series cards are probably the most compatible going back
at least 3 years.
Therese Trudeau wrote:
So these cards are just plug n play? Just plug them in, no software or
drivers required,
all mirroring is managed by firmware built into the card RAID card itself?
Drivers are required for all storage adapters(RAID or not). 3Ware
handles raid in hardware, not in
Most of the things in this email, from me are a personal opinoin, but I
do spend a fair bit of time with these sort of things, these days.
Therese Trudeau wrote:
3Ware 8000-series cards are probably the most compatible going back
at least 3 years. 9000-series cards are faster/better and CentOS
So these cards are just plug n play? Just plug them in, no software or
drivers required,
all mirroring is managed by firmware built into the card RAID card itself?
Drivers are required for all storage adapters(RAID or not). 3Ware
handles raid in hardware, not in software, it has a bios
Therese Trudeau wrote:
I'm just really looking for a RAID card that will do RAID 1, with four drive
capacity, i.e.,
a master drive with the OS and applications installed and mirrored, and a
slave drive for data and
photos, graphic design, video, etc also mirrored. What would battery built
I'm considering setting up my Centos Desktop machine for RAID 1. I
read a lot of good info at this site:http://linuxmafia.com/faq/
Hardware/sata.html#intel-vitesse about differences in fakeraid and
real raid cards.
Discontinued chipset but works fine:
Therese Trudeau wrote:
the whole point of a BBU is that you can turn on write back caching -
and get a fair win in write performance on regular tasks.
Pardon my ignorance, what is write back caching and BBU?
Write Back Caching means the card will cache writes in its onboard
storage,
Therese Trudeau wrote:
Ah that makes total sense now, thanks. Do the 3wire and the Areca cards
allow you to remove battery/cache/disk and install into similar motherboard? Also
when you say remove battery and cache, do you mean remove the entire RAID
card with battery attached to it as
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