RAID Health Status
Oct 15, 2009
I have a PROMISE TECH hardware raid card running a 4 disk RAID 10 array. I logged into today to check the drive statuses which were:
Drive 1: OK
Drive 2: OK
Drive 3: OK
Drive 4: OK, PFA
So they all look to be okay, but that 4th disk has PFA (I'm guessing that stands for predicted failure analysis) but I am not sure if that means its predicting a fail, or just stating that the technology is running?
Also, this array is the system drive on a server which has much too little memory, (there is usually 5-7GB PF swap during the day) and I'm concerned that the drives constantly under that stress are more prone to fail. They are 2.5" SAS 10k Fujitsu if that means anything.
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Oct 26, 2009
I have a Debian server with RAID 1 via hardware.
Could someone tell me how can i check the RAID status? ( if a hd failed or something like this ).
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Mar 7, 2007
Quote:
Today we are going to conduct a detailed study of RAIDability of contemporary 400GB hard drives on a new level. We will take two "professional" drives from Seagate and Western Digital and four ordinary "desktop" drives for our investigation. The detailed performance analysis and some useful hints on building RAID arrays are in our new detailed article.
[url]
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Feb 25, 2007
In httpd-status under vhosts column i sometime see "(unavailable)" instead of actual vhost.
Can you please tell me if it means that the connection has timed out or something else?
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Apr 28, 2008
I am wondering if anyone knows of any good system monitors for Linux. I will be installing several web and database servers at a branch office and would like to receive stats like system temperature, cpu load, memory usage, etc. Basically something to tell to warn me in the event of a hardware error. I am looking something with an easy-to-use web interface and ability to generate reports.
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Oct 9, 2007
How to check for disk health in Unix (freebsd)?
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Feb 21, 2008
I'm not sure how much people use InternetHealthReport.com, but Global Crossing consistently has the worst packet loss - [url]
I'm not sure what the cause is, but I wouldn't be surprised if it's because they are a primary peer for Hurricane Electric and other budget carries who don't have much other Tier 1 peers (i.e. Xeex).
Any comments from current Global Crossing customers?
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Mar 24, 2008
Is Motherboard RAID as good as a dedicated PCI-E card? I am guessing a dedicated card is the best option, though costs more.
We are looking at buying a barebones server from Supermicro. It features an onboard RAID controller which supports RAID 0, 1, 5 & 10 - but for some strange reason it will only support RAID 5 if you use Windows. Here is a link to the page detailing the RAID features.
[url]
We are going to be running Linux, CentOS 5.1, so we will only have the choice of RAID 0, 1 or 10. This isn't an issue, as having RAID 10 on 4x SAS (15k) drives will be fine for speed and stability. What is an issue is would this RAID controller be as fast or reliable compared to a dedicated PCI-E card? If it can only use RAID 5 in windows, does that suggest this controller is too reliant on software? It would be a nightmare to suffer downtime and data loss because the controller couldn't hack it during a drive failure, or one day it decided to bugger up the array when rebooting.
So that leads me to looking at this card, this looks very good for what we need. Are adaptec a reliable brand? I've seen it advertised for £200, which is a good price.
[url]
This card features RAID 5 and 6, would RAID 6 be better than RAID 10 for redundancy, or is it too slow to bother with? Also it seems to have a battery module available for it, what does this achieve? Cos surely if the power dies the hard drives and motherboard can't run off this little battery, or does it just help the controller stay alive long enough with some hard drive information in its memory if the power goes out during a rebuild?
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Jul 23, 2015
The server is idle, according to TOP.
Health center shows
Total usage
6056039.4% used 2198044.96
nginx CPU usage
156.5 % 3250.89
Mail server CPU usage
203.6 % 4844.61
MySQL CPU usage
12.2 % 10.28
Plesk CPU usage
164.6 % 95111.06
Getting tired of all the notifications plesk sends to my phone....
EDIT:
Happens everytime i reboot the server.
After about 15 minutes the stats normalise.
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Dec 12, 2014
I spent a lot of time trying to not have alarm messages into spam folder.
already added address to my contacts
already mark it as important
already changed sender email... but
Plesk where take email for Alarm Message?
Because I changed email (external) with 1 internal, but update alert arrive with administrator email and now is not going to spam, but alarm email arrive with old email (external, that is marked as pishing) ....
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Aug 1, 2014
i can't seem to get access to the health monitor in power user mode. As my plesk license was "upgraded" from a usual 11.x 10 Domains-License to new WebAdmin Package, i can't choose service provider view anymore. How can i get access to the health monitor now?
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Jul 23, 2014
Since the update our Server Health has been very high and is playing up with email and probably other services.
OS CentOS 6.5 (Final)
Plesk version 12.0.18 Update #8, last updated at July 16, 2014 11:20 AM
The system is up-to-date; last checked at July 19, 2014 04:41 AM
Services !Problem
Disk OK
Memory OK
CPU !Problem
Network
This is the log from /var/log/plesk/health-alarm.log
##################################################
2014-06-24T10:01:15+11:00 INFO (6): Server health parameter "Services > Panel CPU usage" changed its status from "green" to "red".
2014-06-24T10:21:16+11:00 INFO (6): Server health parameter "Services > Apache CPU usage" changed its status from "red" to "green".
[Code].....
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Sep 17, 2009
I could try the Software-RAID 5 of the EQ9 Server of Hetzner.
Does anyone here has experiences, how fast a hardware raid 5 compared against the software-Raid 5 is?
The i7-975 should have enough power to compute the redundnacy on the fly, so there would be a minimal impact on performance. But I have no idea.
I want to run the server under ubuntu 8.04 LTS x64.
On it a vitualisation like VMware the IO-Load could get really high.
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Jan 14, 2008
So I've just got a server with 2xSATA raid 1 (OS, cpanel and everything in here) and 4xSCSI raid 10 (clean).
Which one do you guys think will give the best performance:
1. Move mysql only to 4xSCSI raid 10
2. Move mysql and home folder to 4xSCSI raid 10
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Jul 8, 2007
I am in a somewhat complicated situation... I wanted to order a custom server with hardware 3Ware RAID controller but after over a month of waiting I was told the HW RAID controller, as well as any other 3Ware controller they tried, does not work with the motherboard used in the server from Fujitsu-Siemens and that they simply got a reply from FS that the controller is not certified to work with their motherboard.
So although I'd prefer a HW raid, I am forced to either choose a different webhost or setup a software RAID. The problem is, I haven't done that before and am somewhat moderately...scared
I have read a lot of the info about SW RAID on Linux that I could find through Google but there are some questions unanswered still. So I thought that perhaps some of the more knowledgeable WHT members could help me with this problem...
The server specs will be:
Core2Duo E6600 (2.4Ghz), 2GB RAM, 6-8x* 250GB SATA II HDDs, CentOS 4.4 or SuSe, DirectAdmin
* I prefer 8 HDDs (or actually 9) over 6 but I am not sure if their server chassis can hold that many HDDs, I am awaiting answer from them. They don't have any other drives beside the 250GB ones so I am limited to those.
The preferred SW RAID setup is to have everything in RAID 10, except for the /boot partition which has to be on RAID-1 or no RAID I believe, plus one drive as hot spare (that would be the 9th drive). I am quite sure they will not do the setup for me but will give me access to KVM over IP and a Linux image preinstalled on the first HDD so that I'll have a functional system that needs to be upgraded to RAID-10.
How do I do that? The big problem I see is that LILO or GRUB can't boot from a software RAID-5/10 so I will have to mount the /boot partition elsewhere. It's probably terribly simple...if you have done it before which I have not. I have read some articles on how to setup a RAID-5/10 with mdadm (e.g. [url] ) but they usually do not talk about how to setup the boot partition. Should it be setup as a small sized (100-200MB) RAID-1 partition spread over all of the drives in the otherwise RAID-10 array?
What about swap? Should I create a 4-8GB (I plan to upgrade the server RAM to 4GB in near future) RAID-1 swap partition on each of the disks or swap to a file on the main RAID-10 partitions. The second sounds simpler but what about performance? Is swapping to a file on RAID-10 array a bad idea, performance wise?
Is it possible to grow a RAID-10 array in a way similar to growing a RAID-5 array with mdadm (using two extra drives instead of one of course)? mdadm doesn't actually even mention RAID-10 despite it does support it without having to create RAID-0 on top of RAID-1 pairs if the support is in kernel, from what I know.
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Apr 22, 2015
I keep receiving emailed alerts with subject like:
"<server name> alarm level changed"
with content like:
Server health parameter "Memory > Real memory usage" changed its status from "green" to "yellow".
or
Server health parameter "Services > Apache CPU usage" changed its status from "red" to "yellow".
(and then a readout of the top command)
1) Where in Plesk can I see live alerts (or a historical log of these alerts)
2) Where can I change the settings (I think it may be too sensitive and the thresholds need to be adjusted)
3) I don't quite understand the alerts in general either, for example, the "Memory > Real memory usage", the TOP command output is for example:
top - 12:19:59 up 4:56, 1 user, load average: 0.21, 0.21, 0.21
Tasks: 255 total, 1 running, 254 sleeping, 0 stopped, 0 zombie
Cpu(s): 5.5%us, 0.7%sy, 0.2%ni, 92.8%id, 0.8%wa, 0.0%hi, 0.1%si, 0.0%st
Mem: 5967176k total, 2539756k used, 3427420k free, 134972k buffers
Swap: 4194300k total, 788k used, 4193512k free, 664916k cached
More than half the memory is unused, very little swap is in use. I don't even see a reason to be warning about this.
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Jun 21, 2014
I need to sending health notification emails to another email.
I change admin : /usr/local/psa/bin/init_conf --update -email xxx@xxx.xx
Admin change, but health notification email not change.
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Feb 25, 2009
How often do RAID arrays break? Is it worth having RAID if a servers hard drive goes down? I was thinking it may just be a better option to just have a backup drive mounted to my system and in the even of a system failure just pop in a new hard drive, reload the OS, and then reload all my backups?
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May 20, 2009
I have a new server and it is rather slow during raid 1 recovery after system installed
CPU: Intel Core2Duo E5200 Dual Core, 2.5Ghz, 2MB Cache, 800Mhz FSB
Memory: 4GB DDR RAM
Hard Disk 1: 500GB SATA-2 16MB Cache
Hard Disk 2: 500GB SATA-2 16MB Cache
root@server [~]# cat /proc/mdstat
Personalities : [raid1]
md0 : active raid1 sdb1[1] sda1[0]
256896 blocks [2/2] [UU]
md1 : active raid1 sdb2[1] sda2[0]
2096384 blocks [2/2] [UU]
md2 : active raid1 sdb4[2] sda4[0]
480608448 blocks [2/1] [U_]
[=======>.............] recovery = 36.7% (176477376/480608448) finish=1437.6min speed=3445K/sec
the sync speed is just 3.4Mb/second and the total hours needs to be more than 40 hours
Also the server load is very high (nobody uses it)
root@server [~]# top
top - 07:00:14 up 16:55, 1 user, load average: 1.88, 1.41, 1.34
Tasks: 120 total, 1 running, 119 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.2%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st
Mem: 4148632k total, 747768k used, 3400864k free, 17508k buffers
Swap: 5421928k total, 0k used, 5421928k free, 569252k cached
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Oct 22, 2009
I am in the process of restructuring the infrastructure on our servers. I am thinking of using either RAID 5 (1 hot spare) vs RAID 10 as my 1U server has 4 HDD tray.
RAID 5 would have better capacity but RAID 10 has better overall performance. Which one do you guys go for a shared hosting server?
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Dec 23, 2008
Is it possible to turn a non raided setup into Linux software raid, while it is live, and if it's the OS drive? Can you even software raid the OS drive remotely? I've been thinking about doing it for the redundancy (and possible slight performance boost for reads, but doing it more for redundancy). I'm using CentOS.
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May 22, 2008
I want to take some data from a raid-disk (taken from a raid-1 sstem). Put it into a new system already, but this system doesn't have any raid.
When viewing "fdisk -l", it said /dev/sdb doesn't contain valid partition. Is there anyway I can mount it now? I am on CentOS 4 box
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Aug 31, 2013
I just installed the Health Monitor add-on in a brand new Plesk 11.5.30 on CentOS 6.4 but all that it's area in Plesk displays is this funky looking error:
{"status":"error","statusMessages":[{"status":"error","class":"","content":"Unable to load configuration file.Click to expand...
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Apr 27, 2015
I have a one problem in my server . I use in Parallels Plesk v12.0.18_build1200140606.15 os_CentOS 6 I vps in systemOS CentOS6.6 Final Minimal and installing plesk health monitor show error in :
{"status":"error","statusMessages":[{"status":"error","class":"","content":"Unable to load configuration file.
And I try the command
/usr/local/psa/bin/sw-engine-pleskrun /usr/local/psa/admin/plib/scripts/setup-health-monitor.php
output problem is :
Error: Unable to read /proc/partitions
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Aug 18, 2012
Health Monitor Module is installed and running on server, but not visible under Server Administration Panel > Home > Server Health on Plesk Panel 11.0.9 update #7. Is there a trick to configuring home to show it and/or a direct way to launch view of server health?
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Mar 24, 2009
MY server configure our drives with RAID-1.
How can I check it my server configure with 3ware or software raid ?
Also please advise me how can I monitor raid configuration that my raid is working fine or no ?
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Jul 11, 2008
I've been talking to the Planet about trading in my four and a half year old "SuperCeleron" (from the old ServerMatrix days) Celeron 2.4 GHz system for something new. As part of their current promotions, I've configured a system that looks decent:
Xeon 3040, 1 gig of RAM, 2x250GB hard disks, RHEL 5, cPanel+Fantastico, and 10 ips for $162.
Not too bad. I could bump up the ram to 2 gb for, I think, $12 more, which I'm thinking about and wouldn't mind some thoughts on. But, the thing that has me really confused is RAID. I like the idea of doing a RAID 1 setup with those two hard disks. But, the Planet wants $40/month for a RAID controller to do it. I really don't want to go over $200 a month!
Any thoughts on alternative redundancy strategies that might avoid that cost? Software RAID does not seem to be offered by the Planet, unless I can figure out how to do it after installation (is that possible?) Better ideas in general on the server?
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May 23, 2007
Just curious what your thoughts are on performance:
2 SCSI Drives 10k w/RAID 1
or
4 SATA 10k w/RAID 10
Prices are not too different with 4 drives just being a tad more.
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Jun 5, 2007
how well software raid can perform and how it compares to hardware raid. How does software raid actually work and is it worth it?
How should I look at be setting up software raid if I was going to? Would you recommend just to use hardware raid instead?
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Dec 10, 2007
Which do you guys recommend of the following?
4x 73GB 15,000rpm SAS drives in a RAID 10
or
4x 73GB 15,000rpm SAS drives in a RAID 5 w/ online backup
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Nov 3, 2009
Are there any significant difference between 4 15K SAS HD in RAID 10 versus 8 7.2K SATAII HD in RAID 10? I have the same question for 2 15K SAS HD in RAID 1 versus 4 7.2K SATAII HD in RAID 10.
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