3
votes
5answers
457 views

Hot spare host vs cold spare host?

We have several hosts where we have an identical hot spare host, which is patched and updated so it is very close to have to same software and config. In case of failure the network cable is switched ...
0
votes
0answers
12 views

SMI generation / detection in GRUB / real mode vs. in Linux

I'm trying to get an idea of the frequency and duration of SMI events on a Supermicro X10SAE C226 board (2.0a BIOS) with E3-1245v3 Haswell CPU. The Intel BIOS Implementation Test Suite (BITS) SMI ...
0
votes
0answers
47 views

What is the source of the interrupt count in /proc/interrupts

I have a system that should receive an interrupt from a digital I/O card at 10Hz. Every so often the CPU usage will ramp up to about 60%. When I examine /proc/interrupts the count for interrupt ...
1
vote
0answers
53 views

Can NetApp filers/shelfs be directly connected to Linux?

I have a NetApp FAS2050 which is no longer in production. It have 4 disk shelfs. So I wonder: Would it be possible to connect the disk shelfs directly to a Linux host with a LSI adapter, and then ...
0
votes
1answer
31 views

How are BLKIDs Assigned?

Suppose I have a situation like I have installed /etc and /boot in two separate partition which belongs to an USB device , and the rest of the system / and /home in the HDD. Now my question is I need ...
1
vote
1answer
49 views

AST2150 Console Redirection (KVM over IP)

I am using AST2150 Base Board Management Controller which supports KVM over IP. It's connected to the network. Everything is good except the Console Redirection. The console redirection comes up as a ...
1
vote
1answer
98 views

How to use all disk space on preinstalled Linux [closed]

I ordered dedicated server with Linux Debian Wheezy preinstalled with "Paralles Plesk Panel". Provider states I have 2x1TB drives. Yet my avaible disk space is just 100GB. Do I lack a partition? I ...
0
votes
1answer
238 views

Ubuntu 12.04 server and Supermicro AOC-SAS2LP-MV8

I am having some trouble. I have a Supermicro AOC-SAS2LP-MV8 controller card that I am trying to get to work on Ubuntu 12.04 server (x86_64). The card is based on a Marvell 88SE9485. So far lscpi ...
-1
votes
1answer
443 views

Vpd r/w failed This is likely a firmware bug on this device [closed]

Does this mean my RAID 1 device is failing? EDIT: seeing this is a raidcare issue. How can I pull the specs and download/install the driver? netlink: 12 bytes leftover after parsing attributes. ...
2
votes
2answers
1k views

Is a hardware watchdog already active at my CentOS server?

I rent a dedicated server (with Intel Haswell CPU and custom hardware) at a lowcost hosting service and use it with CentOS 6.4 / 64 bit Linux (with stock kernel: 2.6.32-358.14.1.el6.x86_64). Every ...
1
vote
1answer
158 views

Can't sync filesystem without reboot

I'm having an issue with a linux server. Once a week the running mysql instance hangs and there is no way to fully stop it. If I kill it, it remains in zombie status and init does not reap its pid. ...
0
votes
2answers
170 views

How do I re-enable the IPMI temperature sensors?

I've never had a problem reading temperature sensors with ipmitool on my server, but recently the temperature readings started showing up as disabled: # ipmitool sdr list Temp | disabled ...
3
votes
1answer
212 views

How to use a switch as a network tap?

I would like to tcpdump all traffic that my router does when it makes a firmware update. So I have taken a HP ProCurve 1800-8G switch and mirrored port 7 to port 8. I have connected: Internet ...
2
votes
2answers
265 views

RAID 10 — how do you know a drive is going or is bad?

I have some servers with a datacenter all the servers have RAID 10 setup. How do I know when one of the drives is going bad or is bad and needs to be replaced? EDIT: These servers are unmnaaged and ...
-1
votes
1answer
60 views

Is this a sign of a bad drive? [closed]

smartctl --attributes --log=selftest /dev/sda smartctl 5.43 2012-06-30 r3573 [x86_64-linux-2.6.32-379.22.1.lve1.2.17.el6.x86_64] (local build) Copyright (C) 2002-12 by Bruce Allen, ...
0
votes
1answer
27 views

hosting machine capability [duplicate]

I'm curios what's the traffic a dual-socket CPU server machine can handle? Just hypothetical, does anybody have a clue what are the keystones? Is it more about hardware or connection or anything else ...
2
votes
2answers
207 views

High number of ethernet errors. Tool for testing the ethernet card?

have an Asus Sabertooth X79. I often get corrupted files. I checked the RAM, but memtest finds no errors. To avoid the possibility of disk errors, I tried copying files to tmpfs. If I copy from the ...
1
vote
1answer
527 views

Removing raid metadata from drives

Normally when I have a drive which contains raid metadata e.g. from fakeraid or a hardware raid card I can get rid of it with: dmraid -r -E /dev/sdX Or if that doesnt work, doing a simple dd ...
1
vote
2answers
708 views

route packets through hardware loopback interface, not lo

My embedded Linux board has 3 interfaces: eth0 - For all outbound traffic eth1 - A hardware loopback (traffic leaves board, but comes immediately back in the same port) lo - Standard loopback ...
2
votes
1answer
195 views

Bit flipping - detection and reasons

About a week ago I experienced one very interesting situation. I had a workstation - old desktop with Asus P5LD2 motherboard and 4 x 1 GB non-registered DDR2 Kingston memory. That same machine was a ...
0
votes
3answers
124 views

mysql crashs. bad hard drive or hardware

ive seen highloads and mysql crash 2 times in 1 week now. could this be the cause any idea? Jan 3 09:49:19 HOST kernel: [2272100.568769] res 51/40:38:78:7f:f1/40:00:35:00:00/e0 Emask ...
2
votes
1answer
2k views

Server responses “bus error” to every command

I have a linux machine dedicated to MySQL server with a pretty high load. Today I woke up and was terrified to see, that database server is down. I could connect to it via SSH, but it was responding ...
1
vote
2answers
3k views

ECC errors in L3 cache - critical or not?

On a linux server (8x Quad-Core AMD 8378), I'm getting the following errors: [Hardware Error]: MC4_STATUS[-|CE|MiscV|-|AddrV|CECC]: 0x9c294c00001d018b [Hardware Error]: Northbridge Error (node 4): ...
4
votes
2answers
459 views

Why does everybody have the same MAC address as me?

I just bought some consumer-grade McCheap PCI-E NICs (and this was a bad idea). They both have the same MAC address. When I google it, it seems like every card of that company has the same address: ...
2
votes
2answers
402 views

Testing a production hard hard / debugging high I/O Load

I've been getting a lot of high load lately on this server more so then it should for what little is on this system. Seems like just the simplest stuff using the disk like a YUM update will spike the ...
-1
votes
2answers
235 views

server not working smoothly [closed]

Hi I am getting this error message in log. Please suggest something to fix this issue Sep 6 06:19:17 sa1 kernel: sd 0:0:0:0: SCSI error: return code = 0x08000002 Sep 6 06:19:17 sa1 kernel: sda: ...
1
vote
2answers
369 views

Must partprobe before using drive?

This is a followup question to Cannot mount /dev/sdc1 on Debian 5.0, special device /dev/sdc1 doesn't exist Basically, I have 6 SATA hard drives in a machine and I'm trying to create a RAID6 ...
1
vote
1answer
542 views

CentOS 6.2 Server hangs

I have a problem with Centos 6.2 server that is running on an HP Proliang DL380 G4 server where I run a Public FTP Service. The system runs for about a day and then it suddenly hangs, and I cant ...
0
votes
1answer
340 views

unable to recover data from failed hdd [closed]

my hdd failing (or maybe totally dead) i've connected the hdd via USB but it doesn't appear in fdisk Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total ...
3
votes
2answers
177 views

Internal LTO tape drive becomes hot

We use an internal LTO3 tape drive (HP Ultrium 920) in a PC (no particular server hardware) running Linux. The tape drive becomes quite hot - I don't have the exact temperature, but you may touch it ...
0
votes
1answer
477 views

HP ProLiant DL360 G7 watchdog

I have dl360 G7 servers. some times kernel got panic. I understood, that server have hardware watchdog timer. dmesg | grep wdt [ 6.344992] hpwdt 0000:02:00.0: PCI INT A -> GSI 16 (level, low) ...
5
votes
1answer
234 views

Which linux x86 hardware keystore?

I'm terminating SSL/TLS in my DMZ and I have to assume that machine will be hacked. At which point my certificates are compromised. Previously I've used nCipher hardware keystore/accelerator to solve ...
4
votes
2answers
1k views

HP ProLiant DL360 G6 reporting missing fan

I have several refurbished HP ProLiant DL360 G6 servers and several of the systems are reporting fan failures - possibly incorrectly - on fan #2. When running: hpasmcli -s 'SHOW FANS' I get the ...
0
votes
1answer
698 views

How to check what/if hardware watchdogs are available in linux?

Linux supports several types of watchdog hardware. Is there a way to detect the available hardware watchdogs and load the appropriate kernel module (and "softdog" as fallback solution)? I guess, ...
3
votes
1answer
356 views

Moving a linux server to new hardware

We currently have a working coldfusion 9 server running on ubuntu. Its hardware is a lenovo thinkserver running raid 1. We want to move this server to a different lenovo server (slightly different ...
0
votes
1answer
94 views

Hard drive performance in small-sized server+RAID 5 [closed]

Disclaimer: I'm an undergraduate intern and this is my first server build I've been asked to build a small server for our team around the office. We are trying to maximize space (our motherboard has ...
1
vote
1answer
574 views

Poor hard drive performance

I have nearly two identical servers, the only difference between the two is the version of Linux and the Hard Drive. Server 1 had (what I think) is a better drive, therefore the performance should be ...
2
votes
2answers
3k views

ext4 filesystem corruption — maybe hardware error?

I'm getting these errors in dmesg after about half an hour after I turn on the computer: [ 1355.677957] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1318420: (comm updatedb.mlocat) ...
2
votes
5answers
826 views

HP DL380 G3 2U For Basic Web Server in 2012

I have an opportunity to pick up a used HP DL380 G3 2U for $100. I'm looking for a basic entry level web server that I can host a small - medium size website on and more or less learn the ins and outs ...
17
votes
2answers
4k views

What is the command to flash a NIC link light?

I remember using a command line tool to flash a NIC's link light to identify it. I can't remember for the life of me what it was.
1
vote
2answers
562 views

What should I check/replace first in response to mcelog “Memory address parity error” / MEMORY CONTROLLER AC_CHANNEL0_ERR messages

I have a server that kernel panics every few days. mcelog tells me: Hardware event. This is not a software error. MCE 0 CPU 6 BANK 8 MISC 0 TIME 1317928482 Thu Oct 6 15:14:42 2011 MCG status: MCi ...
1
vote
1answer
336 views

How harddisk works [closed]

Looking at how hard disk works. Found that it has a number of platters and a read/write head. But in texts it shows read/write head between each platter. Is it like that in real situation? Also ...
1
vote
1answer
249 views

is there any conflict between HP blade system ProLiant BL680c G5 hardware and Redhat Linux Enterprise 5.5 or 6

We're going to install Linux Red Hat enterprise 5.5 on HP blade server that is connected to a part of SAN storage MSA 2000. I've tested both marked and unmarked sda option in partitioning. I did this ...
7
votes
3answers
510 views

determine hardware configuration using command line

I have a linux machine with ubuntu OS installed on it. Now I want to upgrade the hardware. Namely, I'd like to install more RAM. My question is, how do I determine which kind of RAM installed now, ...
1
vote
1answer
876 views

How to enable SATA in Centos 5?

I have a centos 5 linux box which is currently running off an IDE drive. I want to install a couple of SATA drives as backup drives for now. I have googled that there can be complications with SATA ...
11
votes
5answers
4k views

Linux hard drive serial number as non-root

First of all, I would like to apologies for the title for not including hardware details. This is because I am looking for a command that will work in all Linux distribution. Question: I am very ...
1
vote
1answer
984 views

Hard Drive (Failure) IBM x336, Diagnose and Fix RAID-1 & Configure IBM Software

A year ago I was given an old IBM x336 server to run some personal projects on, now I knew nothing about servers at all so just put some more RAM in, wiped and disks and installed Ubuntu Server on it ...
4
votes
3answers
455 views

Linux only seeing one disk of 4-disk eSATA enclosure

I recently purchased a 4-bay enclosure (Mediasonic Probox -- maybe cheap junk, but should work) with 4 2TB disks. The enclosure has both USB3 and eSATA interfaces. I originally intended to use it on ...
6
votes
3answers
3k views

Is it possible to hardware accelerate LUKS encryption?

My Linux server spends a lot of time computing LUKS encryption. Is there any way to hardware accelerate it (with a PCI express card for example)?
0
votes
1answer
69 views

Where could I source the hardware components to create a (commercially viable) embedded Linux / BSD appliance? [closed]

I'm looking to pilot an Enterprise Linux / BSD appliance in the field and would like to have a 'few' options when it comes to hardware, I haven't had much luck finding hardware solutions (but I'm ...