Re: Degrading disk read performance under 2.2.16

Hi there, I am CC:ing this to Andrea Arcangeli because he is credited at the top of drivers/block/ll_rw_blk.c as writing the elevator code. On Sun, 13 Aug 2000, Jens Axboe wrote: On Sun, Aug 13 2000, Corin Hartland-Swann wrote: The fact remains that disk performance is much worse under

Re: Degrading disk read performance under 2.2.16

Hi Andre, On Fri, 11 Aug 2000, Andre Hedrick wrote: On Fri, 11 Aug 2000, Corin Hartland-Swann wrote: When I try hdparm -m -c -d1 -a, I get the following output: /dev/hdc: setting using_dma to 1 (on) HDIO_SET_DMA failed: Operation not permitted multcount= 16 (on) I/O

RE: owie, disk failure

MV. Regards, Corin /+-----\ | Corin Hartland-Swann | Direct: +44 (0) 20 7544 4676| | Commerce Internet Ltd | Mobile: +44 (0) 79 5854 0027| | 22 Cavendish Buildings |Tel: +44 (0) 20 7491 2000| | Gilbert Street |Fax: +44 (0) 20 7491 201

Re: Patched Kernel

. The patched one should look like this: Personalities : read_ahead not set unused devices: none Regards, Corin /+-\ | Corin Hartland-Swann | Direct: +44 (0) 20 7544 4676| | Commerce Internet Ltd | Mobile: +44 (0) 79

Re: Question on disk benchmark and fragmentation

bonus. Regards, Corin /+-\ | Corin Hartland-Swann | Direct: +44 (0) 20 7544 4676| | Commerce Internet Ltd | Mobile: +44 (0) 79 5854 0027| | 22 Cavendish Buildings |Tel: +44 (0) 20 7491 2000| | Gilbert Street

RE: Question on disk benchmark and fragmentation

unrealistic. But the performance is still mighty nice... Regards, Corin /+-\ | Corin Hartland-Swann | Direct: +44 (0) 20 7544 4676| | Commerce Internet Ltd | Mobile: +44 (0) 79 5854 0027| | 22 Cavendish Buildings

Re: IDE RAID

that the hardware array of UDMA disks appears as one SCSI device) Regards, Corin /+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings

RAID Patch for kernel 2.2.16

screwed up! Regards, Corin PS I've checked that 2.2.16 compiles cleanly after the patch, but I haven't given my RAID partitions a thorough check. I'll report back if I have any problems. /+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79

RE: how should I set up swap?

/+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings |Fax: +44 (0) 20 7491 2010| | Gilbert Street | | | Mayfair|Web

Re: Spare disk for RAID 1

e this helps! Corin /+-----\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings |Fax: +44 (0) 20 7491 2010| | Gilbert Street | | | Mayfair

RE: how should I set up swap?

reconstruction, but also under degraded mode? Regards, Corin /+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings |Fax: +44 (0) 20 7491

RAID 1+0

will break, and so md3 will also fail. Regards, Corin /+-----\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings |Fax: +44 (0) 20

Re: Problems with raidstop and unmounting raid 1

use the three-fingered salute and then flip the switch! Hope this helps as an interim measure... Corin /+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000

Will kernel 2.4 include latest RAID patches?

Hi there, Just a quick question - will the linux kernel 2.4 include the latest RAID patches, including the read-balancing one? Regards, Corin /+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet

Re: Help with RAID5 damage please

n hdh's, and you can do the raidhotadd then! Hope this helps! Corin /+-----\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings |Fax:

Re: How to remove a disk from Raidset which has not yet failed?

: raidstart v0.3d compiled for md raidtools-0.90 Is there a later version I should be using? Regards, Corin /+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000

Email Attachment Virus Alert

Hi All! Received this this morning, and thought I should forward it since Teddy Miller seems to be infected. And I thought it was a hoax! Oh, they joys of running pine on the command line! Regards, Corin /+-\ | Corin Hartland

Re: Fastest / Most stable way to get 2GB files in 2.2?

/+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings |Fax: +44 (0) 20 7491 2010| | Gilbert Street

Re: RAID-0 - RAID-5

/+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings |Fax: +44 (0) 20 7491 2010| | Gilbert Street | | | Mayfair

RAID-1 Performance

bet is going for RAID-5 over 4 disks. Does anyone have any comments and/or suggestions about doing this? Thanks in advance, Corin /+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44

Re: RAID-1 Performance

Holger, On Thu, 27 Apr 2000, Holger Kiehl wrote: On Thu, 27 Apr 2000, Corin Hartland-Swann wrote: I was hoping that RAID-1 would 'stripe' reads between the disks, increasing read performance to RAID-0 levels, but leaving write performance at single-disk levels. Does anyone know why

pII_mmx vs p5_mmx checksum speed

/+-\ | Corin Hartland-Swann | Mobile: +44 (0) 79 5854 0027| | Commerce Internet Ltd |Tel: +44 (0) 20 7491 2000| | 22 Cavendish Buildings |Fax: +44 (0) 20 7491 2010| | Gilbert Street