On 03/06/2011 09:00 AM, compdoc wrote:
Regarding the Marvell drivers, I had good luck with the 'sata_mv' driver in Scientific Linux 6 just yesterday, running a pair of 4-port PCIe-x4 Tempo 'Sonnet' controller cards.
Are those the Mac/Windows Sonnet cards that go for less than $200?
What kind of performance you seeing? Are you doing software raid on them?
Yes, those are the cards which target Windows and OS-X, but they work fine on Linux as well. They use the Marvell 88SX series chips.
They control 6 2TB WD Caviar Black drives, arranged as 5 drives in a RAID-6 array with one hot spare. 3 drives are connected to each of two cards. mdstat shows array re-sync speed is usually over 100 MBytes/sec although that tends to vary quite a bit over time.
On 03/06/2011 09:00 AM, John R Pierce wrote:
On 03/05/11 7:01 AM, Eero Volotinen wrote:
areca works..
for SAS, I prefer LSI Logic.
The Supermicro mobo I'm using (X8DAL-3) has an on-board LSI 1068E SAS/SATA controller chip, although I have the RAID functionality disabled so I can use it as a bunch of drives for software RAID-6. Like the Tempo cards, it has 6 2TB WD SATA drives attached which provides a second set of arrays.
Performance really sucks, for some unknown reason, and I get lots of I/O error messages logged when the drives get busy. There appears to be no data corruption, just a lot of retries that slow things down significantly.
The LSI web site has no info about the errors. The firmware is passing back I/O abort code 0403 and LSI Debug info related to "channel 0 id 9". There are only 8 ports so I don't know which disk drive may or may not be causing problems. The SMART data on all disks shows no issues, although I tend to treat some SMART data with scepticism.
I need to track this error down because my understanding is that the LSI controller chip has very good performance.
Chuck
On Sun, Mar 6, 2011 at 1:18 PM, Chuck Munro chuckm@seafoam.net wrote:
On 03/06/2011 09:00 AM, compdoc wrote:
Regarding the Marvell drivers, I had good luck with the 'sata_mv' driver in Scientific Linux 6 just yesterday, running a pair of 4-port PCIe-x4 Tempo 'Sonnet' controller cards.
Are those the Mac/Windows Sonnet cards that go for less than $200?
What kind of performance you seeing? Are you doing software raid on them?
Yes, those are the cards which target Windows and OS-X, but they work fine on Linux as well. They use the Marvell 88SX series chips.
They control 6 2TB WD Caviar Black drives, arranged as 5 drives in a RAID-6 array with one hot spare. 3 drives are connected to each of two cards. mdstat shows array re-sync speed is usually over 100 MBytes/sec although that tends to vary quite a bit over time.
On 03/06/2011 09:00 AM, John R Pierce wrote:
On 03/05/11 7:01 AM, Eero Volotinen wrote:
areca works..
for SAS, I prefer LSI Logic.
The Supermicro mobo I'm using (X8DAL-3) has an on-board LSI 1068E SAS/SATA controller chip, although I have the RAID functionality disabled so I can use it as a bunch of drives for software RAID-6. Like the Tempo cards, it has 6 2TB WD SATA drives attached which provides a second set of arrays.
Performance really sucks, for some unknown reason, and I get lots of I/O error messages logged when the drives get busy. There appears to be no data corruption, just a lot of retries that slow things down significantly.
The LSI web site has no info about the errors. The firmware is passing back I/O abort code 0403 and LSI Debug info related to "channel 0 id 9". There are only 8 ports so I don't know which disk drive may or may not be causing problems. The SMART data on all disks shows no issues, although I tend to treat some SMART data with scepticism.
I need to track this error down because my understanding is that the LSI controller chip has very good performance.
I've had Linux integration issues with them for various reasons. Also, one LSI chipset may differ, a *LOT*, from the next LSI chipset in performance and integration.
I like Adaptec for price/performance, and good Linux overall compatibility (including CentOS). Just don't order those "fell off the truck" Taiwan specials that are clearly Adaptec chipsets, but have actually had the numbers filed off. (Ran into those at a hardware vendor that specialized in promising BIG! NEW! FEATURES! but which had never tested the components in combination, and explaining that they needed to files 2 millimeters off the overlong and badly cut mounting plates or the controller cards would *keep* unseating was..... not a good conversation.)
Nico Kadel-Garcia
Nico Kadel-Garcia wrote:
I like Adaptec for price/performance, and good Linux overall compatibility (including CentOS). Just don't order those "fell off the truck" Taiwan specials that are clearly Adaptec chipsets, but have actually had the numbers filed off.
Adaptec is proud of their "HostRAID" technology that has a spotty record with Linux compatibility. The manufacturer's descriptions have led people to mistakenly think they bought a hardware RAID card when in fact the RAID functions are implemented in software. This approach has been dubbed "fake RAID". It's not clear to me that this is a win compared to using the kernel's software RAID features.
http://www.brentnorris.net/blog/archives/158 tells the sorry tale of a company whose products used to be a safe bet. The comments tend to confirm the sad state of affairs.
https://secure.wikimedia.org/wikipedia/en/wiki/Fakeraid#Firmware.2Fdriver-ba... covers fake RAID.
On Sun, Mar 6, 2011 at 10:07 PM, Charles Polisher cpolish@surewest.net wrote:
https://secure.wikimedia.org/wikipedia/en/wiki/Fakeraid#Firmware.2Fdriver-ba... covers fake RAID.
Ouch. That was *precisely* why I used the 2410, not the 1420, SATA card, some years back. It was nominally more expensive but well worth the reliability and support, which was very good for RHEL and CentOS.
I hadn't been thinking about that HostRaid messiness because I read the reviews and avoided it early.
-
Charles Polisher -
Chuck Munro -
Nico Kadel-Garcia