A small combined webserver and fileserver with focus on power consumption and storage size, what would be a cheap and stable solution to this in terms of hardware ? I'm not interested in NAS solution only servers ..
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For some reason we have some network storage not mounted properly after an unexpected restart (ie OS or memory issue) and the subsequent reboot. Has anyone come across this before? It's a bit strange that certain disks are not mounted.Anyway, to detect this, can we insert an extra line into the /etc/inittab to perform post start checks. For example, I have inserted an extra line before the runlevel scripts in /etc/inittab file.
The line will call /usr/local/fstab-check.sh to perform a check on the disks mounted via /etc/fstab. Am thinking of comparing the output from the command "df" versus the content of /etc/fstab.
I have servers which contain SATA disks and SAS disks. I was testing the speed of writing on these servers and I recognized that SAS 10.000 disks much more slowly than the SATA 7200. What do you think about this slowness? What are the reasons of this slowness?
I am giving the below rates (values) which I took from my test (from my comparisons between SAS 10.000 and SATA 7200);
dd if=/dev/zero of=bigfile.txt bs=1024 count=1000000 when this comment was run in SAS disk server, I took this output(10.000 rpm)
(a new server,2 CPU 8 core and 8 gb ram)
1000000+0 records in
1000000+0 records out
1024000000 bytes (1.0 GB) copied, 12.9662 s, 79.0 MB/s (I have not used this server yet) (hw raid1)
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I have/had a PC with several hard drives, and a mix of ubuntu and windows on multi boot.The old boot drive died screaming, and I need to start again. (But my data is safe! yay!)
Is there anything special about which drive can be the main drive to start booting from? Or to put it another way, can I install to any of the other 3 and expect it to work, or do I need to switch them around so a different drive is on the connections for the recently dead one?
I have built a couple RAID's, but I'm uncertain of how I should format the partitions of the raid. Should I format partitions on each disk, and then add them to a raid, or should I create a raid on unformated disks and then format the raid as a partition? Does it matter, and are there performance/reliability issues? I'm creating a RAID-5 using 3 SATA disks on RHEL for user data area.
View 5 Replies View RelatedWe use powerpath on RHEL servers, with at least 2 paths to each disk, as you know the powerpath creates a pseudo devices called emcpowerX. I was wondering if there is any overhead if we don't use the lvm.conf to filter out all sdX disks? Except the "duplicate PV found" messages on LVM, does it delays the boot of the server?
View 1 Replies View RelatedCan a Mac Mini, Server edition, be booted off either of its two disks?
I'm interested in having one disk with OSX Server on it, and the other a dual boot Linux/Windows, to get around OSX's fussiness about boot loaders.
I am connecting a complete set of four hard disks externally to my linux server.I have certain queries on that
1. How to make it detected. Will the cd which had come with that will install the required drivers?
2. How the cd drive will work out in linux?
3. How to configure all the 4 HDD into one LVM?
4 How to remove an already installed software from a linux system?
I'm attempting to do a low level wipe of a server in our office. I originally attempted to use DBAN but it wouldn't recognize the disks.
I've now moved on to attempting to use a Live Boot of Ubuntu 10.10 on a USB drive.
I'm using the following terminal command - sudo dd if=/dev/urandom of=/dev/sda bs=1M
When I did this the first time it simply wiped the USB drive that had Ubuntu on it.
What do I need to do in order to have it wipe all 4 disks on the server instead of the USB Drive?
So, I have raid5 array with one spare disk. Is it possible to spin-off/shutdown the spare disk until one drive fails and the spare disk is needed?
View 1 Replies View RelatedI have to move all the files and directories between 2 file systems. Is it good practice to move them at once or first copy them and then move ? How to do this to preserve the permissions and directory structure ?
View 3 Replies View RelatedI have been running a server with an increasingly large md array and always been plagued with intermittent disk faults. For a long time, I've attributed those to either temperature or power glitches. I had just embarked on a quest to a) lower case and drive temperature. They were running between 43 and 47C, sometimes peaking at 52C, so I've added more case fan power and made sure the drive cage was in the flow (it has it's own fan, too). Also, I've upgraded my power supply and made very sure that all the connectors are good. The array currently is a RAID6 with 5 Seagate 1,5TB drives.
When everything seemed to be working fine, I looked at my SMART logs and found that two of my drives (both well over 14000 operating hours) were showing uncorrectible bad blocks. Since it's RAID6, I figured, I couldn't do much harm, ran a badblocks test on it, zeroed the blocks that were reported bad, figuring the drive defect management would remap them to a good part of the disk and zeroed the superblock. I then added it back to the pack and the resync started. At around 50%, a second drive decided to go and shortly thereafter a third. Now, with two out of five drives, RAID6 will fail. Fine. At least, no data will be written to it anymore, however, now I cannot reassemble the array anymore.
Whenever I try I get this:
Code:
mdadm --assemble --scan
mdadm: /dev/md1 assembled from 2 drives and 2 spares - not enough to start the array
Code:
cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [linear]
md1 : inactive sdf1[4](S) sde1[6](S) sdg1[1](S) sdh1[5](S) sdd1[2](S)
7325679320 blocks super 1.0
md0 : active raid1 sdb2[0] sdc2[1]
312464128 blocks [2/2] [UU]
bitmap: 3/149 pages [12KB], 1024KB chunk
Which is not fine. I'm sure that three devices are fine (normally, a failed device would just rejoin the array, skipping most of the resync by way of the bitmap) so I should be able to reassemble the array with the two good ones and the one that failed last, then add the one that failed during the resync and finally re-add the original offender. However, I have no idea how to get them out of the "(S)" state.
Code:
mdadm --examine /dev/sdd1
/dev/sdd1:
Magic : a92b4efc
Version : 1.0
Feature Map : 0x1
Array UUID : d79d81cc:fff69625:5fb4ab4c:46d45217 .....
At times I see heavy hard-disk activity slowing down system.I have enough RAM and enough of it free.Apparently I am not doing anything that should cause this.'vmstat' shows high numbers for "bi bo" I want to find out which processes are doing "bi bo".How can I zero in on the particular processes?What command?
View 3 Replies View RelatedIs SUBJ possible? For example: I have 1 disk with ext2 (ext3) partition and information written on it. I want to make a mirror using the disk. I put this one and another unformatted one into a server, create an appropriate /etc/raiddraive, and do mkraid. Shall I get a mirror witn intact information from the first disk? If not, are there any ways to do so?
View 1 Replies View RelatedI use Squeeze with Xfce. My problem is that recently (after the xfce updates) the xfce power manager doesnt react to the power button - it is set to suspend. I dont have gnome-power manager or anything like it running.
If i reboot the computer, the power button will work but if i suspend and resume, it doesnt work again.
The computer is built on an Asus M3N78-VM mobo (2GB RAM/Athlon3200+ single core).
acpi_listen detects the button press.
Any thoughts?
I am using Ubuntu 10.04 64-bit and I purchased a new ALFA AWUS036H wireless card. I would like to know if this "1Watt" wireless card is configured for full power. iwlist wlan0 txpower results:
wlan0 unknown transmit-power information. Current Tx-Power=27 dBm (501 mW). It appears to me that I should be able to increase the power. "iwpriv wlan0 highpower 1" does not work. Do I need to patch the new default driver that comes with Ubuntu 10.04 64-bit with the aircrack one following these directions:[URL]...? Monitor mode and a injection tests seem to work fine with the driver I have installed.
I'm looking for any power monitoring devices for Linux to allow monitoring power quality, voltage changes, and outages. This would be for North American three phase power system. I want to have this data fed live to my own program. It should be something much better than just jury-rigging a circuit to fee the power waveform into 2 or 3 audio cards.
View 10 Replies View RelatedI built this small server for a coworker that by nature of its purpose will get turned off and on often. I want it setup so that he can just press the power button to have it power off normally. Normally I can set that up in Gnome, but in this case I don't want to install a GUI. Is there software that can tie the button and the the poweroff/shutdown cmd together without needing a desktop environment
View 2 Replies View RelatedI had unplugged my PC last night as sometimes there's storms at night this morning I plugged in PC and the power light is blinking and the PC wont come on at all tried different power cord, same result
PC is a AMD athlon64 3300+ 2.4ghz SiS graphics
probably the power-supply or what?
If it is the power supply, how do I find new one as I've never had to replace anything on it or any other PC?
Also, I really need access to the hard drive but it's a weird hard drive and was wondering if I could put that hard drive in my K7 PC, which already has 2 drives in it can a pc have 3 drives? do I have to add/have another ribbon cable for 3rd drive?
I've been running my Dell SC440 as a home server/workstation for about a year now and whilst it can cope with both roles, it is power hungry, loud and does get a little slow down sometimes. What I am looking to do is create a home server to take away the need of it to be on 24x7.My requirements in a home server would include:
- Media Server (using TwonkyMedia or uShare)
- NZB Downloader (hellaNZB or sabNZB)
- AFP + NFS file serving
- rsync/unison for Linux backups and N900 media sync and backup
- Email/Calendar/Contacts hosting and sync (zimbra or zarafa?)
I would like to achieve this with an Acer Revo and a couple of 1 or 1.5TB external hard disks, I'm unsure if the Atom processor would be strong enough for all of these services, although I could test it using my netbook, if that can cope, the Revo would be able to easily.
I just got my electricity bill for July & August and noticed a dramatic increase in my consumption. Basically, the amount of electricity has almost doubled (from 433 to 748kWh) and the increase happens mainly between 5pm and 11pm, as well as during weekends... I did not have to search for too long before I pointed out the issue... My new home server. It is configured to auto WOL at 5PM and auto shutdown (Cron) at 11PM. It also runs 24h/day on weekends...
Here's the server's config:
Hardware:
MSI Platinum K9N mobo
AMD Athlon64 CPU
1GB DDR2 Ram (2X 512MB)
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Everything else is only "run-on-demand" or scripts... I am searching for suggestions on how to minimize the power requirements. The video card is going to be replaced soon, by a standard PCI 4MB videocard. Next I will get rid of the 80GB & 750GB HDD's to be replaced by a 1.5TB HDD...
I am looking for some advice on a Linux home server. I'd like it to be low power and reliable. I have searched and found a lot of information online already, but it's too hard to choose due to the many options and opinions.
The main reasons for me to get a home server are (more or less in order of priority):I'd like to have my files centrally, so I can reach them from my laptop, my PC, my phone, from work etc ( or stream them)
I'd like to have my own e-mail server for my own domain(s), perhaps also Jabber
I'd like to have my own web server to develop and perhaps even to host a website
I might play around with home automation in the future
Of course I am not here to ask questions regarding the software I would need, but I'd like to get a nice low power (I am a bit of an environmentalist, but not extreme) and reliable server.
I also get the impression that many people like AMD Geode processors and the choice is certainly not limited to these products. I am here for suggestions.It's not a necessity that the server will be small. Actually, I think I'd like to have something with two discs, so I can use RAID (no experience, but it makes sense to do), so the B3 looses from the Via here.Also, I like a bit of flexibility, so I think I would prefer a home network in the future with a separate modem, router, server and WAP over an all in one solution. Perhaps even have the hard disks in a separate case? Actually, I think it makes sense to place a server out of sight (aesthetics, theft, etc), while a WAP should of course be fairly visible.
At the moment, I do not have lots of files to store, but I think it makes sense to get decent capacity anyway (at the very least 500 GB and expandable).Making a good choice is more difficult for me than spending the money. I'd be happy to spend something around 400 - 600 for a good product. I am able to put components together myself if that would give me a much better product for the same amount of money (did it before, but not so often).
I have an EPIA M10000N (VIA Nehemiah 1GHz integrated CPU) motherboard (square MB each side 17cm) in a GA610 case. These last two links show the situation quite well.I have neither a CD/DVD drive, nor a floppy drive in the case. Only a hard drive, the motherboard, and the power supply.As you can see in the pictures, the whole thing is cooled by a 4cm fan on the CPU heat sink, and another 4cm fan at the rear of the power supply.This is rather noisy (and unbearable in a living room!).After looking (not that hard, though...) for a solution, I did not find a proper (less than 20dB, and good quality) solution. So the living-room PC became a server. It's either that of throwing it away, anyway. Having nothing to loose, I want to try something. And I'd like to have your opinion, dear reader.I want to:
- remove both 4cm fans,
- remove the cover from the power supply,
- cut a round hole on top of the case,
- fit a 12 or 14cm fan on the lower side of the round hole, right above both the CPU and the power supply.
I'm new to this cooling stuff. I saw that a 4cm fan can extract up to 5 CFM of air, whereas a big fan can extract at least 60 or 70 CFM!Changing two noisy 5 CFM fans with a single silent 60 CFM fan seems OK to me.What do you think of the idea?Next, for better reuse, I may buy a Noctua 14cm NF-S14 FLX. It is big and silent, and 71 to 110 CFM seems a lot! And its fixation holes match those of a standard 12cm fan, thanks to the unusual shape
Do you approve?
I still hesitate a bit because:
- the Noctua NF-P12 1300 might be more sturdy due to its regular shape...
- the Enermax Magma UC-MA12 might be a better choice because it can be washed... on the other hand, because of that, it may get loose with time...
I had a power failure the other day and my server shutdown abruptly. After bringing the server up I noticed that the /var partition came up as read only. I was not able to edit the crontab, not able to write to files within /var/log/ and do other write operations within /var.
I did a mount and it showed that /var was mounted read and write but when trying to run certain operations the system was still saying that it was read only.
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On the last release, I had this app installed where I could pick my power profile. I could use power conservatively, and performance would suffer a bit, but longer batt life,or I could have it automatically detect, or I could have the apps use all the power they want and then some. I'm looking to reinstall that app. What was the name of it?I can't remember, and so far, can't find.
View 2 Replies View Relatedmy SheevaPlug just died, and I need to look for new device to replace it. My goal is to build a fanless, low power consumption, linux server. Currently I am thinking of purchasing a QNAP NAS device (TS-110 model) and installing Debian on it.
View 2 Replies View RelatedToday, I need to talk about some strange problem that faces me in my Linux Server, the power goes down and my server goes off, but when the power returns the server powered on and it works, but some services are not working properly like:
SSH, HTTP
When I try to login remotelt via ssh client like putty it ask me for username but, it hangs after I put my username and not asking me for the password. The second error is related to my web-server which redirect me to Apache default page and when I go for the terminal to make restart for httpd service, here is the output :
> service httpd restart
Stopping httpd: [ OK ]
Starting httpd: [Thu May 20 10:51:15 2010] [error] (EAI 3)Temporary failure in name resolution: Could not resolve host name admin.abakhiet.info -- ignoring!
[Thu May 20 10:53:07 2010] [error] (EAI 3)Temporary failure in name resolution: Could not resolve host name [URL] -- ignoring!
[Thu May 20 10:53:07 2010] [warn] NameVirtualHost 196.202.58.94:0 has no VirtualHosts
[OK]
I have built a Centos 5.3 server for a friend of mine that is being used as a NAS server. The server has 4 1TB drives in a RAID 5 configuration and a dedicated non raid system drive for the OS. My friend isnt very Linux literate so I need this bow to be relatively simple. I have worked most of it out but have a question with regards to remote reboot.
I need to be able to shut this device down through the power switch without human intervention (at the moment when the power switch is pushed the server asks to confirm shutdown) the server wont have a Monitor connected so this isn't practical. Is it possible to use the power switch to do an clean, immediate shutdown?
The other option is shutdown through a web page is this something that has been done before? I know he can do it through terminal by issuing a shutdown now command but as I said this guy wants something simple. I don't really want to explain everytime he needs to shut the Server down how to do it if he can just do it via a website or even with the power button.
Before to describe my problem I want to say that I searched a lot on the internet and I think I tried all the solutions provided by other users to similar problems.
I've got an IBM xSeries 346 server running CentOS 5.5 with all updates applied with yum.
The video card is an ATI Radeon (lspci says: 01:06.0 VGA compatible controller: ATI Technologies Inc Radeon RV100 QY [Radeon 7000/VE]).
Everything worked fine until a bad day where there was an environmental power failure and the server crashed.
I turned it on, I manually check the file system, some files went lost and after the reboot the X server didn't start.
After the first boot I had problem with /etc/rc.d/rc.sysinit, sbin/multipath.static and /dev/cpu/microcode, I solved them and now the message it shows is:
"Failed to start the X server (your graphical interface) It is likely that it is not set up correctly. Would you like to view the X server output to diagnose the problem?"
I choose OK and it appears an empty log, if I go in /var/log/gdm and I do an ls -al:
total 0
-rw-r--r-- 1 root root 0 Oct 28 04:44 :0.log.4
-rw-r--r-- 1 root root 0 Oct 28 04:44 :0.log.3
-rw-r--r-- 1 root root 0 Oct 29 04:52 :0.log.2
-rw-r--r-- 1 root root 0 Oct 29 04:52 :0.log.1
-rw-r--r-- 1 root root 0 Oct 29 04:52 :0.log
So a lot of empty log files.
I press enter on the OK that appears at the bottom of the screen and it says: Would you like to try to configure the X server?
I choose Yes, I enter the root password and appears the following messages:
Couldn't start X server on card 0
Couldn't start X server with old config, trying with a fresh configuration
Then another messages:
Trying to restart the X server, I press enter on OK and it loops the initial message ("Failed to start the X server...)
I have made a server using a bananapi. The bananapi is an embedded linux mini PC, using an allwinner A20 SOC. This server boots and runs from an uSD card, and logs data from sensors to an attached 1TB hard drive. This works OK, but the hard drive consumes a lot of power (about 2.5W), this essentially doubles the amount of power needed. I am planning to power this setup from an accu, therefore I would like to keep power consumption as low as possible.
I am planning to let the application log to the uSD card. After a while the uSD card is almost full. At that moment I can wake up the HD, move the data to the HD, delete the data from the uSD card, set the HD to sleep, and wait until the uSD card is full again. Is there some clever way to do this? I can do this with basic shell scripting, but then I get all kind of issues like open files that are copied to the HD while they are still being filled by the logging application. This would mean they end up on the HD incomplete.
