Search found 377 matches
- Sat Mar 15, 2014 2:00 am
- Forum: Knowledge Base
- Topic: RaspberryPi pukes on software RAID1 over USB
- Replies: 1
- Views: 3802
Re: RaspberryPi pukes on software RAID1 over USB
Here are the interesting bits of the kernel logfile (/var/log/messages) before the crash: NOTE: "..." means that the message was repeated several times. Mar 12 20:39:13 hostname kernel: [90750.049479] ERROR::dwc_otg_hcd_urb_enqueue:515: Not connected Mar 12 20:39:13 hostname kernel: [90750...
- Thu Mar 13, 2014 7:34 pm
- Forum: Knowledge Base
- Topic: Debian & IPMI: Error prefix not set
- Replies: 0
- Views: 2765
Debian & IPMI: Error prefix not set
[PROBLEM] I tried to install Debian by mounting the ISO as virtual CD-ROM using IPMI. In the BIOS I choose the "UEFI: IPMI Virtual CD-ROM" device for boot. The image was detected and GRUB was booting, but the following error message appeared: Error prefix not set The boot process continue...
- Thu Mar 13, 2014 12:10 am
- Forum: Knowledge Base
- Topic: RaspberryPi pukes on software RAID1 over USB
- Replies: 1
- Views: 3802
RaspberryPi pukes on software RAID1 over USB
[PROBLEM] I have 2 USB drives attached to a Raspberry Pi, mirroring one 500 GiB partition using Linux software RAID1. In general, the RAID1 is up and running, but: Synchronizing the RAID can't be done on the Raspberry Pi, because it causes the OS to freeze. When the RAID is properly in-sync, copyin...
- Tue Mar 11, 2014 12:22 pm
- Forum: HowTo's
- Topic: Move Linux software RAID1 between machines
- Replies: 2
- Views: 6350
Re: Move Linux software RAID1 between machines
Troubleshooting: In case you need to manually re-assemble the array, the following command might help: $ mdadm --assemble --scan --verbose --no-degraded If this gives you some errors containing: mdadm: /dev/sdx1 has wrong uuid. you can try the following: $ mdadm --assemble /dev/mdX /dev/disks Where...
- Tue Mar 11, 2014 12:21 pm
- Forum: HowTo's
- Topic: Move Linux software RAID1 between machines
- Replies: 2
- Views: 6350
Move Linux software RAID1 between machines
1) Unmount and stop the RAID: On the computer you currently have the RAID1 running, unmount it if it's still mounted. Then type: $ mdadm -S /dev/mdx Replace "mdx" with the actual RAID device on your setup (md0, md127, ...) NOTE: Stopping the software RAID is important, because with unmoun...
- Thu Mar 06, 2014 8:11 pm
- Forum: HowTo's
- Topic: Verify MD5SUM file on Windows
- Replies: 1
- Views: 5759
Verify MD5SUM file on Windows
Download a proper md5sums commandline tool: http://etree.org/cgi-bin/counter.cgi/software/md5sum.exe#!md5!eb574b236133e60c989c6f472f07827b Save it in "C:\Program Files (x86)". Then open a text editor (no, Word is not a text editor) and copy/paste the following code: @echo off cls @echo. @e...
- Thu Feb 20, 2014 9:24 pm
- Forum: HowTo's
- Topic: RHEL 6: Compile stock-kernel
- Replies: 0
- Views: 3310
RHEL 6: Compile stock-kernel
NOTE: This is work in progress and not finished. Might even be complete nonsense, but I keep my notes here until I've completed this task. I've compiled a kernel hundreds of times already in the past, but this time, it's not just the kernel, but building proper packages. It's a bit trickier. I want...
- Thu Feb 20, 2014 6:34 pm
- Forum: Knowledge Base
- Topic: md5sum: strange "FAILED open or read"
- Replies: 0
- Views: 3191
md5sum: strange "FAILED open or read"
[PROBLEM] I wanted to use "mdsum -c" to verify the MD5 checksum, using a previously generated .md5 textfile. The contents were one line, formatted as expected: 39f539c54480480a23d758595847ce9a *audiofile.wav The .wav file existed, filename was correct, but md5sums threw the following erro...
- Tue Feb 18, 2014 4:33 pm
- Forum: HowTo's
- Topic: GlusterFS on Raspberry Pi
- Replies: 1
- Views: 4716
Connection failed. Please check if gluster daemon is operati
[PROBLEM]
If you get the following error upon running "gluster volume create":
You need to start the "glusterd" demon first:
If you get the following error upon running "gluster volume create":
[SOLUTION]Connection failed. Please check if gluster daemon is operational.
You need to start the "glusterd" demon first:
Code: Select all
$ service glusterd start
- Tue Feb 18, 2014 2:29 pm
- Forum: Knowledge Base
- Topic: Partition multiple drives: Scripting "parted"
- Replies: 0
- Views: 3084
Partition multiple drives: Scripting "parted"
On RHEL, there's no sgdisk :( At least not in the default repositories. So I'm using "parted", but most of the documentation found refers to its interactive mode. I'm dealing with 45 drives per chassis, so I need to script it. Thanks to a blog post by Roderick Tapang , I now know that one ...
- Wed Feb 12, 2014 3:18 pm
- Forum: Knowledge Base
- Topic: RHEL & IPMI Virtual Storage (CD/DVD): disc was not found
- Replies: 1
- Views: 4115
exec of anaconda failed: Exec format error
[PROBLEM] Right after the installer found the virtual disc drive, it immediately quit with the following error message: Running anaconda 13.21.215, the Red Hat Enterprise Linux system install - please wait. exec of anaconda failed: Exec format error install exited abnormally [1/1] The system will b...
- Tue Feb 11, 2014 7:09 pm
- Forum: Knowledge Base
- Topic: RHEL & IPMI Virtual Storage (CD/DVD): disc was not found
- Replies: 1
- Views: 4115
RHEL & IPMI Virtual Storage (CD/DVD): disc was not found
I'm trying to install RHEL 6.5 from ISO images over the network, using the "Virtual Media" functionality of the IPMI interface of the Supermicro mainboards. Booting the RHEL "boot" ISO works fine, but during installation, the installer pops up the following error message: The Red...
- Thu Jan 16, 2014 1:14 pm
- Forum: Knowledge Base
- Topic: Memory (RAM) tests...
- Replies: 0
- Views: 2699
Memory (RAM) tests...
I'll use this thread to collect information about testing RAM. I'm doing this, because I'm currently running extensive hardware tests on a few Supermicro server hardware. I found it very interesting to read David Wren's article about the difficulty testing ECC using Memtest86 v5 , due to vendor-spec...
- Thu Dec 26, 2013 9:35 pm
- Forum: HowTo's
- Topic: GlusterFS on Raspberry Pi
- Replies: 1
- Views: 4716
GlusterFS on Raspberry Pi
I'm using a Raspberry Pi as storage server with external USB harddrives. So far so good, but now I'd like to have multiple external disks behave like a single big one. Thanks to a project we're currently busy with at work, I got to know GlusterFS . Which is perfect for that job. I'm gonna write down...
- Wed Dec 18, 2013 4:46 am
- Forum: Knowledge Base
- Topic: Video codec: h264-lossless performance
- Replies: 0
- Views: 2936
Video codec: h264-lossless performance
I was doing some speed and filesize comparisons of different lossless video codecs (Dirac, FFV1, H.264 and JPEG2000). During these tests I stumbled over the fact that h264 can perform at amazing speeds - even in lossless mode! :shock: Here are the results for SVT's "park joy" reference vid...