Hi Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
-- TIA Paolo
2009/2/8 Paolo Supino paolo.supino@gmail.com:
Hi Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
Hi, 3ware (9650 are nice) or areca. or even software raid. Laurent
Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
3ware, areca, adaptec
t
3ware, areca, adaptec
t _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
careful on adaptec..a fair amount of their cards are fraid as well.
Am 08.02.2009 um 14:51 schrieb William Warren:
3ware, areca, adaptec
t _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
careful on adaptec..a fair amount of their cards are fraid as well.
Yup. 3Ware or Areca, and some higher-end Adaptec/LSI stuff. (Don't know which)
But for simple RAID1 with two disks, software-RAID is usually good enough. And for the higher-end stuff... well, this has been discussed before. ;-) Turns out, RAID-controllers were over-hyped ;-)
Rainer
On Sun, Feb 08, 2009, Pint?r Tibor wrote:
Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
3ware, areca, adaptec
This thread brings up a question I have been meaning to ask for a while. I have a Supermicro box with an Adaptec AIC-8120 on a X5DPL-TGM main board. It is working fine with CentOS 5.something, at least as far as basic operations.
My question is whether there is anything similar to the 3ware 3dm2 management software for this under Linux?
Bill
Bill Campbell wrote:
This thread brings up a question I have been meaning to ask for a while. I have a Supermicro box with an Adaptec AIC-8120 on a X5DPL-TGM main board. It is working fine with CentOS 5.something, at least as far as basic operations.
My question is whether there is anything similar to the 3ware 3dm2 management software for this under Linux?
That is a simple 8 port SATA controller chip. Any 'RAID' it supports is fake-raid implemented in the BIOS/Drivers, you're better off using Linux native mdraid.
The 3ware and Areca controllers mentioned repeatedly here have their own RAID processors, cache ram, and (optional?) battery backup, and implement 'hardware raid' where the OS drivers see as a single logical drive for each RAID volume built.
On 2/8/2009 4:38 AM, Paolo Supino wrote:
Hi
Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
-- TIA Paolo
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
anything areca or 3ware.
Paolo Supino wrote:
Hi
Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
-- TIA Paolo
The software raid in linux with mdadm is very powerful. Alot of people stay away from software raid because they think that a hardware solution would be easier to work with. But with a hardware solution, how do you monitor the status of your drives? There is usually windows software for that but normally a linux client is non existent. All of the monitoring and management is built into mdadm. Once you learn it, it is very easy to use and you can move your raid array from system to system as long as mdadm is installed. You certainly can't move a hardware raid setup to another machine unless the cards are identical.
Sam
On Sun, 2009-02-08 at 15:33 -0600, Sam wrote:
The software raid in linux with mdadm is very powerful. Alot of people stay away from software raid because they think that a hardware solution would be easier to work with. But with a hardware solution, how do you monitor the status of your drives? There is usually windows software for that but normally a linux client is non existent. All of the monitoring and management is built into mdadm. Once you learn it, it is very easy to use and you can move your raid array from system to system as long as mdadm is installed. You certainly can't move a hardware raid setup to another machine unless the cards are identical.
While I think that Linux software RAID is both solid and stable, when running a production environment I'd much rather use hardware RAID with hot-swappable drives. Example? Dell PERC RAID. Yes - historically there have been problems - but today it's rock solid. Monitoring it? Easy - there are Nagios plugins for omreport. Drive fails? Pull the drive and put the new one in. Nothing else to do. Same thing with HP DL-[35]xx class boxes...
And if you're running, say, a farm of a few hundred servers, you can just have someone go in once a week armed with a list of disks to pull and replace.
In short, IMHO, hardware RAID with hot-swap capabilities, on proven, STANDARDIZED hardware makes it easier (and cheaper) to support a larger number of boxes. (If you don't have standardized hardware, and tend to run somewhat of a mishmash, you're probably better off considering software RAID...)
-I
Paolo Supino wrote:
Hi
Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
Adaptec RAID 2405, 3ware, Areca
As many people have stated in this thread, 3ware and Areca make some good hardware RAID solutions.
Software RAID using mdadm works too, quite well, I might add. I was one of those people who stayed away from software RAID in linux, thinking it was too complicated and difficult, I was wrong. It's dead easy to do, and expanding your disks can be done on the fly (if you have a SATA controller that supports hotplugging as many these days do.) Perhaps the best thing about software RAID, in my opinion, is that it's light enough on the machine that a PIII server can be reading/writing to the array at 10MB/s.
Now you might say, 10MB/s, who cares? That's small stuff. But, when that's the load the network infrastructure at this location was designed to handle, you don't need anything higher performance.
Just my two cents. -Hal
Christopher Chan wrote:
Paolo Supino wrote:
Hi
Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
Adaptec RAID 2405, 3ware, Areca
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
/me puts on salamander suit.
Hal Martin wrote:
As many people have stated in this thread, 3ware and Areca make some good hardware RAID solutions.
I don't know about Areca but 3ware certainly. I have never come across issues with any 3ware boards hardware-wise. I suppose you have an opinion about Adaptec 2405 and its other new lines of real hardware cards?
Software RAID using mdadm works too, quite well, I might add. I was one of those people who stayed away from software RAID in linux, thinking it was too complicated and difficult, I was wrong. It's dead easy to do, and expanding your disks can be done on the fly (if you have a SATA controller that supports hotplugging as many these days do.) Perhaps the best thing about software RAID, in my opinion, is that it's light enough on the machine that a PIII server can be reading/writing to the array at 10MB/s.
The guy asked for real hardware raid card suggestions. You can preach all you like about software raid, there are cases where hardware raid cards with sufficient resources will offer better value.
Now you might say, 10MB/s, who cares? That's small stuff. But, when that's the load the network infrastructure at this location was designed to handle, you don't need anything higher performance.
I don't know about you but where I work, one of the first infrastructure issues I dealt with was upgrading from Fast Ethernet to Gigabit. The teachers all appreciate their logins running faster, the loading of their multi-megabyte powerpoints being faster, their on-disk gallery of school trip pictures loading faster, etc. In this age of files being megabytes in size even hundreds, a ten megabyte/sec network does not fly anymore.
BTW, I use raidz so as I do not need to hit anything over 100MB yet and 2 TB storage is sufficient for the moment. Good luck trying to get a controller card that has 8 ports or more without even a fakeraid bios. I am so happy that there are many motherboards that come with 4 SATA ports and work under Linux. But find one that also has a PCIe 4x slot is a pain in the neck.
Just my two cents. -Hal
Christopher Chan wrote:
Paolo Supino wrote:
Hi
Last week I had a lengthy thread in which someone indicated the my SIL card is a FRAID (don't know if F stands for the F word or Fake, though it doesn't really matter). I want to replace the controller with a controller that Linux will see the RAID1 group as a single HD and not multiple HDs as it happens with the SIL controller. Recommendations anyone?
Adaptec RAID 2405, 3ware, Areca
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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Bill Campbell -
Christopher Chan -
Hal Martin -
Ian Forde -
John R Pierce -
Laurent Wandrebeck -
Paolo Supino -
Pintér Tibor -
Rainer Duffner -
Sam -
William Warren