Re: [CentOS] Avago (LSI) SAS-3 controller, poor performance on CentOS 7

2017-01-18 Thread Gordon Messmer
For the archive's sake: https://plus.google.com/+GordonMessmer/posts/H5DuyP1LHPU?sfc=false https://plus.google.com/+GordonMessmer/posts/eSe6iNmk1Fs?sfc=false During testing, I found that under CentOS 7.2, the default storage layout for software RAID5 was the worst possible configuration. 512k

Re: [CentOS] Avago (LSI) SAS-3 controller, poor performance on CentOS 7

2016-11-05 Thread John R Pierce
On 11/5/2016 12:08 PM, Gordon Messmer wrote: On 11/05/2016 06:40 AM, Steven Tardy wrote: What firmware is/are on the cards? In the dmesg output I included: mpt3sas0: LSISAS3008: FWVersion(10.00.00.00), ChipRevision(0x02), BiosVersion(08.25.00.00) The driver version difference between C6

Re: [CentOS] Avago (LSI) SAS-3 controller, poor performance on CentOS 7

2016-11-05 Thread Gordon Messmer
On 11/05/2016 06:40 AM, Steven Tardy wrote: What firmware is/are on the cards? In the dmesg output I included: mpt3sas0: LSISAS3008: FWVersion(10.00.00.00), ChipRevision(0x02), BiosVersion(08.25.00.00) The driver version difference between C6 and C7 could interact badly with old firmware.

Re: [CentOS] Avago (LSI) SAS-3 controller, poor performance on CentOS 7

2016-11-05 Thread Steven Tardy
> On Nov 4, 2016, at 11:08 PM, Gordon Messmer wrote: > > LSI Logic / Symbios Logic SAS3008 What firmware is/are on the cards? The driver version difference between C6 and C7 could interact badly with old firmware. What firmware does $vendor suggest? Does C7 in BIOS

[CentOS] Avago (LSI) SAS-3 controller, poor performance on CentOS 7

2016-11-04 Thread Gordon Messmer
I have a handful of new systems where I've seen unexpectedly low disk performance on an Avago SAS controller, when using CentOS 7. It looked like a regression, so I installed CentOS 6 on one of them and reloaded CentOS 7 on the other. Immediately after install, a difference is apparent in the