search for: speed_limit_min

...larly rotated and re-synced (SATA disks in hot-swap bays). The timing of the resync seems to be extremely variable recently, taking anywhere from 3 to 10 hours even if the partition is unmounted and the drives aren't doing anything else and regardless of what I echo into /proc/sys/dev/raid/speed_limit_min or _max. Is there some way to tell if the drives are going bad or speed it up consistently if they aren't? -- Les Mikesell lesmikesell at gmail.com

On Fri, Jun 28, 2019 at 07:01:00AM +0200, Nicolas Kovacs wrote: > 3. Here's a neat little trick you can use to speed up the initial sync. > > $ sudo echo 50000 > /proc/sys/dev/raid/speed_limit_min > > I've written a detailed blog article about the kind of setup you want. > It's in French, but the Linux bits are universal. > > https://www.microlinux.fr/serveur-lan-centos-7/ You can't have actually tested these instructions if you think 'sudo echo > /path...

Is my new 300GB RAID 1 array REALLY going to take 18936 minutes to sync!!???

I have configured 2x 500G sata HDD as Software RAID1 with three partitions md0,md1 and md2 with md2 as 400+ gigs Now it is almost 36 hours the status is cat /proc/mdstat Personalities : [raid1] md0 : active raid1 hdb1[1] hda1[0] 104320 blocks [2/2] [UU] resync=DELAYED md1 : active raid1 hdb2[1] hda2[0] 4096448 blocks [2/2] [UU] resync=DELAYED md2 : active raid1

...n quite some redundancy. 2. The initial sync will be very (!) long, something like a day or two. You can use your server during that time, but he'll not be very responsive. 3. Here's a neat little trick you can use to speed up the initial sync. $ sudo echo 50000 > /proc/sys/dev/raid/speed_limit_min I've written a detailed blog article about the kind of setup you want. It's in French, but the Linux bits are universal. https://www.microlinux.fr/serveur-lan-centos-7/ Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'?glise - 30730 Montpezat Site : http...

Hello list. The next days we are going to install Centos 7 on a new server, with 4*3Tb sata hdd as raid-5. We will use the graphical interface to install and set up raid. Do I have to consider anything before installation, because the disks are very large? Does the graphical use the parted to set/format the raid? I hope the above make sense. Thank you in advance. Nikos

Hi, Has anyone had any experience with Intel Vroc[1]? I'm possibly having to deal with a new server with such technology and can't find much (real world) information about it. Looking at the specs it's basically a glorified fake raid which usually turns on my alarm bells. Has anyone done any testing, how does it compare with "real" raid or software raid? Cheers, Lucian [1]

...t speeds with a 128KiB chunksize. So the next step was failure testing. First, I fired off memtest.sh as found at <http://people.redhat.com/dledford/memtest.html>. Then, I did 'mdadm /dev/md0 -f /dev/sdo1', and it started to rebuild as it should. I cranked up /proc/sys/dev/raid/speed_limit_min to 15000 so that it would reconstruct in a decent amount of time (the default of 1000 was leading to a 53 hour estimate for the recovery). But memtest.sh started kicking out errors (non-matching diffs). And then I got this: EXT3-fs error (device md0): ext3_journal_start_sb: Detected aborted...

Dear all, I'm not used to handling software raid. I've inherited a server which has raid 10 set. one of our disks failed, and it's to be replaced today. My question is; any hint how to add this new disk to the existing raid array ? first thought is :- Create identical partitions as other disks in the array i'd like to add it to.- add it to raid. Though i'm extremely worried of

...ly raid-check script executes, performance nose dives, and I/O wait skyrockets. The raid check starts out fairly fast (20000K/sec - the limit that's been set), but then quickly drops down to about 4000K/Sec. dev.raid.speed sysctls are at the defaults: dev.raid.speed_limit_max = 200000 dev.raid.speed_limit_min = 1000 Here's 10 seconds of iostat output, which illustrates the issue: [root at r1k1log] # iostat 1 10 Linux 3.10.0-327.18.2.el7.x86_64 (r1k1) ? ?05/24/16 ? ?_x86_64_? ?(32 CPU) avg-cpu:? %user? ?%nice %system %iowait? %steal? ?%idle ? ? ? ? ? ?8.80? ? 0.06? ? 1.89? ?14.79? ? 0.00? ?74.46...