similar to: raid 6 on centos 7

Let me see if I can, um, reboot this thread.... I made a RAID 1 of two raw disks, /dev/sda and /dev/sdb, *not* /dev/sdax /dev/sdbx. Then I installed CentOS 7 on the RAID, with /boot, /, and swap being partitions on the RAID. My problem is that grub2-install absolutely and resolutely refuses to install on /dev/sda or /dev/sdb. I've currently got it up in a half-assed rescue mode, and have

On 2017-02-15, John R Pierce <pierce at hogranch.com> wrote: > On 2/14/2017 4:48 PM, tdukes at palmettoshopper.com wrote: > >> 3 - Can additional drive(s) be added later with a changein RAID level >> without current data loss? > > Only some systems support that sort of restriping, and its a dangerous > activity (if the power fails or system crashes midway through

Andreas, why is it relevant only in case of RAID5 or RAID6? regards, Martin On Fri, Mar 7, 2014 at 5:57 PM, Andreas Dilger <adilger@dilger.ca> wrote: > Note that stride and stripe width only make sense for RAI-5/6 arrays. > For RAID-1 it doesn't really matter. > > Cheers, Andreas > >> On Mar 6, 2014, at 13:46, Martin T <m4rtntns@gmail.com> wrote: >>

Il 30/01/19 16:49, Simon Matter ha scritto: >> On 01/30/19 03:45, Alessandro Baggi wrote: >>> Il 29/01/19 20:42, mark ha scritto: >>>> Alessandro Baggi wrote: >>>>> Il 29/01/19 18:47, mark ha scritto: >>>>>> Alessandro Baggi wrote: >>>>>>> Il 29/01/19 15:03, mark ha scritto: >>>>>>>

Hi, I just replaced Slackware64 14.1 running on my office's HP Proliant Microserver with a fresh installation of CentOS 7. The server has 4 x 250 GB disks. Every disk is configured like this : * 200 MB /dev/sdX1 for /boot * 4 GB /dev/sdX2 for swap * 248 GB /dev/sdX3 for / There are supposed to be no spare devices. /boot and swap are all supposed to be assembled in RAID level 1 across

Hi, I created a RAID1 array of two physical HDD's with chunk size of 64KiB under Debian "wheezy" using mdadm. As a next step, I would like to create an ext3(or ext4) file-system to this RAID1 array using mke2fs utility. According to RAID-related tutorials, I should create the file-system like this: # mkfs.ext3 -v -L myarray -m 0.5 -b 4096 -E stride=16,stripe-width=32 /dev/md0

CentOS 6.3, x86_64. I have noticed when building a new software RAID-6 array on CentOS 6.3 that the mismatch_cnt grows monotonically while the array is building: # cat /proc/mdstat Personalities : [raid6] [raid5] [raid4] md11 : active raid6 sdg[5] sdf[4] sde[3] sdd[2] sdc[1] sdb[0] 3904890880 blocks super 1.2 level 6, 512k chunk, algorithm 2 [6/6] [UUUUUU]

Can anyone provide a tutorial or advice on how to configure a software RAID 5 from the command-line (since I did not install Gnome)? I have 8 x 1.5tb Drives. -Jason

Note that stride and stripe width only make sense for RAI-5/6 arrays. For RAID-1 it doesn't really matter. Cheers, Andreas > On Mar 6, 2014, at 13:46, Martin T <m4rtntns@gmail.com> wrote: > > Hi, > > I created a RAID1 array of two physical HDD's with chunk size of 64KiB under Debian "wheezy" using mdadm. As a next step, I would like to create an ext3(or

On 01/30/19 03:45, Alessandro Baggi wrote: > Il 29/01/19 20:42, mark ha scritto: >> Alessandro Baggi wrote: >>> Il 29/01/19 18:47, mark ha scritto: >>>> Alessandro Baggi wrote: >>>>> Il 29/01/19 15:03, mark ha scritto: >>>>> >>>>>> I've no idea what happened, but the box I was working on last week

We (a small college with about 3000 active accounts) are currently in the process of moving from UW IMAP running on linux to dovecot running on a cluster of 3 or 4 new faster Linux machines. (Initially using perdition to split the load.) As we are building and designing the system, I'm attempting to take (or find) benchmarks everywhere I can in order to make informed decisions and so

Has anyone had issues starting xen0 on a md? I have installed it a few times now w/ and w/o raid. Anytime I have a raid1 mirror, Xen panics on boot when trying to mount /. It gets past waiting for /dev/md0 to appear. John _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Has anyone had issues starting xen0 on a md? I have installed it a few times now w/ and w/o raid. Anytime I have a raid1 mirror, Xen panics on boot when trying to mount /. It gets past waiting for /dev/md0 to appear. John _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

The stripe and stride options do two things: - shift block and inode bitmaps in each group to be on different disks - align the block allocation to the stripe and stride boundaries to avoid read-modify-write in RAID The first one is irrelevant if the flex_bg option is used, since it already packs the bitmaps together and achieves the same effect. The second is meaningless for RAID-1 since

On 06/13/2015 07:51 AM, Jonathan Billings wrote: > On Fri, Jun 12, 2015 at 09:00:52PM -0600, jd1008 wrote: >> But I would still like to get up to 7, >> but as I indicated in another post, I cannot use the 7's >> iso because it crashes immediately during boot. >> Problem with bringing up X. >> As I also stated in another post, centos 6.4 had no problems >>

How slow and how reliable is software raid 6 on CentOS 5. The system I'm going to use is A socket 939 dual core Athlon, 4 gigs of ram and a 3ware 7506-8 controller. Its mostly going to be used for storage (Movies, MP3s etc.). Thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi, I just received a new server (HP DL180G5) with 12x 1TB HDs and I bumped into fdisks 2TB limits... Since this is an entry level server, I can't use the classic HP bootable utilities to create smaller volumes et can only create a big RAID6. I found out that: using parted, labelling it gpt and creating the partitions would do the trick. But, what about grub? I read that it does not support

I think this discussion probably came up here already but I couldn't find much on the archives. Would you able to comment or correct whatever might look wrong. What options people think is more adequate to use with Gluster in terms of RAID underneath and a good balance between cost, usable space and performance. I have thought about two main options with its Pros and Cons No RAID (individual

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

I'm setting up this huge RAID 6 box. I've always thought of hot spares, but I'm reading things that are comparing RAID 5 with a hot spare to RAID 6, implying that the latter doesn't need one. I *certainly* have enough drives to spare in this RAID box: 42 of 'em, so two questions: should I assign one or more hot spares, and, if so, how many? mark