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Rebuilding array on 3ware 9690SA-8I

TL;DR version RAID10 array working fine Reboot server as part of maintenance Array inoperable (no access whatsoever) Controller logs say a single drive is bad Remove drive & test – no bad sectors found Err on the side of caution, replace drive with known good one Controller won’t rebuild array onto new drive Even with  Full Article…

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3ware RAID – one unit INOPERABLE

After a reboot (to upgrade the kernel), one of the spare HDD is inoperable… Before I proceed with a fix, I wanted a second opinion. This is what I think I need to do: CODE: SELECT ALL # tw_cli maint deleteunit c0 u2 # tw_cli maint createunit c0 p0 rspare The current state of the system  Full Article…

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Error: “aacraid: Host adapter abort request”

AACRAID based controllers have an underlying timeout/recovery cycle that is 35 seconds long. The default in some SCSI subsystems was 60 seconds in the past, but is now standardized at 30 seconds which results in an interference pattern between the controller and the Linux SCSI subsystem. The alternate workaround is for the user to adjust the timeout  Full Article…

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kernel: aacraid: Host adapter abort request (0,0,0,0)

ervers are running Adaptec 5405 RAID cards with 2×300 GB SAS disks. Everytime in /var/log/messages I get information about SCSI hang: kernel: aacraid: Host adapter abort request (0,0,0,0) kernel: aacraid: Host adapter reset request. SCSI hang ? kernel: aacraid: SCSI bus appears hung I reviewed controller logs, and I saw that each time the controller  Full Article…

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AACRAID based controllers timing out / aborting / SCSI hang

We’ve been lately starting to use more Adaptec RAID controllers rather than 3ware RAID controllers. 3ware has been nothing but trouble for us, dropping hard drives, even RAID5 arrays are running slower than a regular hard drive with no RAID. Our latest issue was a server just simply having a Kernel Panic when using high  Full Article…

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Replace failed disk in MegaRAID array

Install MegaCli software You can download the latest release from LSI here: http://www.lsi.com/support/Pages/Download-Search.aspx . Search for “megacli”. There is also an excellent driver repository here: http://www.thomas-krenn.com/de/download.html (german language). To install the software, unpack the zip file and run the install command according to your OS. For a Linux system, the command is usually # rpm -Uhv ./MegaCLI/MegaCli_Linux/MegaCli-8.05.71-1.noarch.rpm Preparing… ###########################################  Full Article…

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LSI MegaRAID – megacli

I wanted to verify that the RAID controller would start an automatic rebuild.  I popped out one of the drives and the very loud alarm started screaming.  I waited a little bit and put the drive back in.  The alarm continued and the array did not start rebuilding.  It turns out that the controller has  Full Article…

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Linux get used and unused RAM slots details with dmidecode

Following is the command (We have to run dmidecode command with sudo/root permission): $ dmidecode -t 17 | grep “Size:” Output: Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: 2048 MB Size: 2048 MB Size: No Module Installed  Full Article…

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demidecode

# dmidecode can see the server chasing information such as server tag, server model, product model and more… # dmidecode -t -17 | grep Size to can view the RAM size that been installed and the slot not yet installed RAM. To check the maximum RAM capacity can installed.. # dmidecode -t 16 Therefore, ignore  Full Article…

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A quick way to check memory slots on a Linux box

dmidecode -t 16 Maximum Capacity shows us the maximum amount of memory can be installed in the machine. Number of devices tells us how many slots there are on the motherboard – in this case, 8. Now we can interrogotate DMI type 17 – ‘Memory Device’ to show us details of installed memory midecode -t  Full Article…

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lshw -C memory

“lshw -businfo” gives me the board manufacturer and product (ASUS P4G8X) and that board has 4 slots. It can use different RAM speeds (PC2100, PC1600) but the speed actually used in my machine is not told by lshw…     dmidecode -t memory

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Linux get used and unused RAM slots details with dmidecode

$ dmidecode -t 17 | grep “Size:” Output: Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: 2048 MB Size: 2048 MB Size: No Module Installed Size: No Module Installed Size: No Module Installed Size: No Module Installed Size:  Full Article…

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Report the used RAM slots in a Linux machine

lshw (http://ezix.org/project/wiki/HardwareLiSter) is a terminal program that shows plenty of information about your computer system, including specifics of the memory. This is the sort of information it gives. *-memory description: System Memory physical id: 40 slot: System board or motherboard size: 4GB *-bank:0 description: DIMM SDRAM Synchronous 800 MHz (1.2 ns) product: PartNum0 vendor: Manufacturer0  Full Article…

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Megaraid SAS Raid Controller

I have about half a dozen servers all running the Intel RS2BL080 raid controller on Oneiric server AMD64. It works fine using the megaraid_sas kernel module but when I try to use megacli to probe the card, it tells me that there are no raid controllers available. Intel don’t have Ubuntu as a supported OS, so they couldn’t help me.  Full Article…

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How to read the SMART values of the drive in RAID

The use of smartmontools enables direct access to the physical drive behind the controller, eg. for the first drive. First of all, the device id needs to be determined with the megacli tool: # megacli -pdlist -a0| grep ‘Device Id’ Device Id: 4 Device Id: 5 This can now be specified as a “megaraid” option, for example:  Full Article…

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How to read the status of the hardware-based RAID

To read the status of the LSI RAID Controller, the LSI megacli command-line tool needs to be installed. This is already pre-installed in the Rescue System. The status of the RAID may be obtained by using the following command (show all logical devices on all controllers):   megacli -LDInfo -Lall -Aall Example RAID 1: Adapter  Full Article…

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MegaCLI Error Messages

0x00 Command completed successfully 0x01 Invalid command 0x02 DCMD opcode is invalid 0x03 Input parameters are invalid 0x04 Invalid sequence number 0x05 Abort isn’t possible for the requested command 0x06 Application ‘host’ code not found0x07 Application already in use – try later0x08 Application not initialized0x09 Given array index is invalid0x0a Unable to add missing drive to array, as row has no empty slots0x0b Some of the CFG resources conflict with each other or  Full Article…

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SUPERMICRO AOC-USAS-H8iR SAS/SATA RAID Controller, 8 ports, 3 Gb/s, Levels 0/1/5/6/10/50/60, w/ iButton, 256MB cache, No BBU, UIO

Supermicro AOC-USAS-H8iR UIO (Universal I/O) SAS Internal RAID Adapter Features: LSISAS 1078 8-port PCI-E SAS controller 8-port (8 internal) 3Gb/s per port Supports RAID 0, 1, 5, 6, 10, 50, 60 On board hardware IO Processor 256MB 667MHz DDR2 on-card cache Advanced array configuration and management utilities Automatically negotiates PCI-E link widths Power management support  Full Article…

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SUPERMICRO AOC-USAS-H8iR SAS/SATA RAID .

  Products   Accessories   [ AOC-USAS-H8iR ]  Add-on Card Supermicro 3Gb/s Eight-Port SAS Internal RAID AdapterThe Supermicro UIO MegaRAID AOC-SAS-H8iR features 8 internal SAS connectors for high-performance storage connectivity. This RAID card is built on the LSI Logic SAS IC technology and proven MegaRAID technology. It addresses the growing demand for increased data throughput and scalability requirement across the enterprise-class server  Full Article…

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Guide to control your laptop’s fan speed running Ubuntu Linux.

This is essentially a translated version of this guide, which was written in German. Before you go on, I would like to make clear that I will not be held accountable for any damage to your machine resulting from using this guide. Step 1. Install the thinkfan software and the sensors: sudo apt-get install thinkfan lm-sensors Step  Full Article…

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How to control fan speed?

Install the lm-sensors  and fancontrol  packages. Configure lm-sensors In terminal type sudo sensors-detect and answer YES to all YES/no questions. At the end of sensors-detect, a list of modules that need to be loaded will be displayed. Type “yes” to have sensors-detect insert those modules into /etc/modules, or edit /etc/modules yourself. Run sudo service module-init-tools restart. This will read the changes you made  Full Article…

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How To Control Fan Speeds in Ubuntu

sudo apt-get install lm-sensors Then you need to run sensors-detect. sudo sensors-detect and just follow the prompts. Add the recommended lines to /etc/modules. Now, if you don’t want to reboot, you’ll have to manually activate the modules. sudo modprobe module1 module2 where module1 etc. = the module names provided from sensors-detect. Next, you need to create your fancontrol  Full Article…

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Fan Speed Controlf

Fancontrol, part of lm_sensors, can be used to control the speed and sound of CPU/case fans. This article covers configuration/setup of the utility. Sensor driver Support for newer motherboards may not yet be in the Linux kernel. Check the official lm-sensors devices table to see if experimental drivers are available for such motherboards. It is recommended not to  Full Article…

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Motherboard details /Linux commandline

There is a wonderful command called dmidecode which fetches the DMI data from your machine’s BIOS You can get all the data out of dmidecode by simply issuing a quick $ sudo dmidecode If you are after a particular piece of information you can use dmidecode to return just the string in which you are  Full Article…

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Super Micro Computer X8DTU-F, LGA 1366/Socket B, Intel Motherboard

Product description Product Information Supermicro motherboards based on the Intel 5520 chipset support Intel’s Xeon 5500 series processors in the LGA 1366 socket. With features that include support for 36 PCI-E 2.0 lanes, up to 144 GB DDR3 memory, and integrated IPMI 2.0 support, these boards deliver the highest performance. Product Identifiers Brand Super Micro  Full Article…

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