AW: Mustn't be RAID 1 and 0 read-performance be similar?

2007-08-20 Thread Rustedt, Florian
Ok, So reading out TWO streams serial from each disk would give the speedup, wouldn't it? The driver would just have to cache the four(6,8,..) streams until they are merged? So the driver has just to cache two streams per disk and all would be perfect...? Just as proposal for the future

bug in --manage mode

2007-08-20 Thread exe
Hello, I hit a bug in mdadm. According to --manage --help this must work, but it doesn't: -bash-3.2# mdadm --manage -a /dev/md2 /dev/sda3 mdadm: /dev/sda3 does not appear to be an md device But this works fine: -bash-3.2# mdadm --manage --add /dev/md2 /dev/sda3 mdadm: re-added /dev/sda3

Re: raid5:md3: kernel BUG , followed by , Silent halt .

2007-08-20 Thread Dan Williams
On 8/18/07, Mr. James W. Laferriere [EMAIL PROTECTED] wrote: Hello All , Here we go again . Again attempting to do bonnie++ testing on a small array . Kernel 2.6.22.1 Patches involved , IOP1 , 2.6.22.1-iop1 for improved sequential write performance

Linear RAID hot grow

2007-08-20 Thread Dat Chu
I am trying to find the mdadm version that support Linear RAID hot grow. Does anyone have a link to point me to? I am currently running 2.6.2. With warm regards, Dat Chu - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a message to [EMAIL PROTECTED] More

Re: Linear RAID hot grow

2007-08-20 Thread Justin Piszcz
On Mon, 20 Aug 2007, Dat Chu wrote: I am trying to find the mdadm version that support Linear RAID hot grow. Does anyone have a link to point me to? I am currently running 2.6.2. With warm regards, Dat Chu - To unsubscribe from this list: send the line unsubscribe linux-raid in the body of a

Re: Linear RAID hot grow

2007-08-20 Thread Dat Chu
The links on Neil's website to those patches are no longer there. When I try to hot grow a linear raid, it says that hot grow for linear raid is not supported. Where would I find those patches? With warm regards, Dat Chu On 8/20/07, Justin Piszcz [EMAIL PROTECTED] wrote: On Mon, 20

Re: Linear RAID hot grow

2007-08-20 Thread Neil Brown
On Monday August 20, [EMAIL PROTECTED] wrote: The links on Neil's website to those patches are no longer there. When I try to hot grow a linear raid, it says that hot grow for linear raid is not supported. What is the exact error message? What kernel are you using? hot-grow for linear does

Re: Raid5 Reshape gone wrong, please help

2007-08-20 Thread Greg Nicholson
On 8/19/07, Greg Nicholson [EMAIL PROTECTED] wrote: On 8/19/07, Greg Nicholson [EMAIL PROTECTED] wrote: On 8/19/07, Neil Brown [EMAIL PROTECTED] wrote: On Saturday August 18, [EMAIL PROTECTED] wrote: That looks to me like the first 2 gig is completely empty on the drive. I

Re: Linear RAID hot grow

2007-08-20 Thread Dat Chu
I am currently running 2.6.22.1 kernel with mdadm version 2.6.2. When I try to run mdadm --grow /dev/md2 --add /dev/sdd1 mdadm: Cannot add new disk to this array mdadm -D /dev/md2 /dev/md2: Version : 00.90.03 Creation Time : Thu Apr 12 15:10:30 2007 Raid Level : linear Array

4 Port eSATA RAID5/JBOD PCI-E 8x Controller

2007-08-20 Thread Richard Scobie
This looks like a potentially good, cheap candidate for md use. Although Linux support is not explicitly mentioned, SiI 3124 is used. http://www.addonics.com/products/host_controller/ADSA3GPX8-4e.asp Regards, Richard - To unsubscribe from this list: send the line unsubscribe linux-raid in

Re: Linear RAID hot grow

2007-08-20 Thread Neil Brown
On Monday August 20, [EMAIL PROTECTED] wrote: I am currently running 2.6.22.1 kernel with mdadm version 2.6.2. That combination should work. When I try to run mdadm --grow /dev/md2 --add /dev/sdd1 mdadm: Cannot add new disk to this array Odd. I tried add a drive to a three-drive linear