Performance With 500GB+ SATA Hard Drives
Jan 16, 2008running new servers on 500GB+ hard drives, how are these drives performing when they become 50% full?
Can they properly be 50% or more utilized on a cPanel like server with 200+ acccounts?
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How To Distribute Service/content Across Multiple Hard Drives For Best Performance
Mar 19, 2007Suppose I have only two phisical hard drives. What is the most optimal way to distribute the following (a windows server):
OS/IIS
Web pages and scripts
SQL server
SQL database
Should it be :
HD1 : OS/IIS + Web pages/scripts + SQL server
HD2: SQL database
or other setups?
400GB Hard Disk Drives In RAID 0, RAID 5 And RAID 10 Arrays: Performance Analysis
Mar 7, 2007Quote:
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]
SATA Drives :: Detected Within The BIOS But Not In CentOS
Feb 1, 2008I installed 2 SATA raptors drives on my server. I formatted/partitioned one of the drives through WHM. After rebooting both drives disappeared. They are still detected within the BIOS but not in CentOS. It is possible that I installed a wrong driver or made a bad configuration change.
Server Info:
CentOS 4.6 64bit
cPanel/WHM
Motherboard: [url]OS is running on a 250GB IDE drive
2 SATA WD Raptors (That I am trying to get to work)
SATA Drives For A Dell Poweredge 2650
Jul 24, 2008Is there any way to use SATA harddrives instead of SCSI harddrives with a Dell Poweredge 2650? I purchased the Dell on the cheap. It came with one 36GB SCSI drive. Four more hotswap slots. No sleds/caddies/trays for additional drives, so I need those as well.
Looking at the market (eBay mainly) for used SCSI harddrives, it's pretty pricey to get drives of a decent size (73gb+, $50+ each). I would like to use SATA drives instead (get them brand new vs. used SCSI). Problem is this server does not have an embedded SATA controller, just the SCSI Perc3/DI controller. So maybe get a 3ware 8000 series SATA controller + sata drives + trays? Is that possible? There are no molex connectors inside the server. Power to the harddrives comes from the SCSI backplane.
The server will be just for my personal stuff (personal web site, DNS, etc), nothing mission critical. Just trying to save a few bucks buying cheap large capacity SATA drives vs. used smaller capacity SCSI drives.
Hard Drives For VPS
Apr 23, 2009I'm building a couple of VPS host servers for a client.
Each server have to host 20 VPS and each server will be 4 cores with 32GB of ram. So CPU and ram should be just fine, my interrogatioon now is hard drives. The company owns the machines, but not the drives yet.
I searched a lot on your forums but found nothing relating on VPS. I'm basicly a DBA IRL, so I have experience in hardrives when it comes to databases, but it's completely different for VPS.
According to my boss, each VPS will run a LAMP solution (having a separeted DB cluster is out of question for some reason).
First, raid1 is indeed a must. There is room for 2x 3.5 drives. I might be able to change the backplane for 4x2.5, but i'm not sure...
I've came to several solutions:
2x SATA 7.2k => comes to about 140$
2x SATA 10k (velociraptor) => comes to about 500$
2x SAS 10k with PCIe controller => comes to about 850$
2x SAS 15k with PCIe controller=> comes to about 1000$
They need at least 300GB storage.
But my problem is that the servers do not have SAS onboard so I need a controller and in my case the cheapest solution is best.
But I'm not sure that SATA 7.2k will hold the charge of 20 complete VPS.
Does it worth it to go with SAS anyway or SATA should be just fine? With SATA better use plain old sata 7.2k or 10k drives?
That's a lot of text for not much: What is best for VPS: SATA 7.2k, SATA 10k or SAS 10k?
What To Do With 6 Hard Drives
Mar 25, 2007I am about to buy a Compaq server with 6 SCSI hard drives. In you opinion, what is the best RAID configuration with 6 HDs?
View 14 Replies View RelatedRLX Blade Hard Drives?
Jan 7, 2008Do the old RLX Blade servers use 'mini' hard drives? I can't find an answer anywhere. I seem to recall that they use smaller 2.5" drives. Is this the case?
And, if so, do they make "good" drives worthy of being in a server in that size? Are they essentially just a laptop drive?
Linux Hard Drives
Jan 12, 2008On my centos webserver I currently am using a 250gb ide drive.
I just bought 2 Western Digital Raptor WD1500ADFD 150GB 10,000 RPM 16MB hard drives.
And now I am wondering what kind of setup I should have?
Should I have the 250gb hd as a backup drive now and have the two raptors in a raid 0 array.
What would be the best configuration?
Where/How To Duplicate Hard Drives
Jul 3, 2007I am in a little bit of trouble I got a couple (5) of 750GB hdds that I need backed up to another couple (5?) of 750GB hdds so I can save the data storage on them. They are in a Linux box with a LVM setup I also have a RAID ware card on it but not using any RAID # on them. I decided after finding out what I could do with it to go to Windows 2003 on the server and installing RAID5/6 on it.
It seems that I will have to give up all my data and have everything wiped off from the hard drives this is very sad for me but I still have a chance to save the data on them. So I am thinking of copying them to another bunch of hard drives and then re-add it once the system is in place.
I was looking at this
[url]
But thats clearly too expensive as I just need to back up 5 hard drives (750GB/each) and just need to do it one time. Anyone have any suggestions to this or how should I go about doing it. It doesnt have to be right away but its good to know my options.
Is there any place where they might to do this kind of stuff they let you rent their machine for a couple of hours for a fee so you can back up your data? The server is a COLO and the hardware is mine so I have every right to take it off and back it up with no problem from the datacenter.
Server With 2 Hard Drives
Sep 11, 2007am getting new server with 2 (73GB) hard drives i need to know the following:
1.I need to put /home in one hard drive 73GB and the other partitions like /boot, /tmp,/usr and /var on the other drive
where should i put /home? on the primary or or secondary drive?is there any effect on the speed?
2. Am used to servers with 1 drive. is there any difference when it comes to security aplications such as APF,BFD,mod security and other aplicatuions settings?
3. in general should i take the same actions when handling a server with 1 drive and server with 2 drives?
1 Domain To Use 2 Hard Drives
May 31, 2007i just got another HDD on my server, but i want to use 1 domain and use both hard drives for the 1 domain.
How do i set it up so that both hdd's can be used by the 1 domain..im using WHM but cant seem to do it.
SAS Vs SATA II Performance
Nov 26, 2008On a normal shared hosting server, what kind of performance gains can you see using a SAS drive instead of a SATA II in raid-1?
View 6 Replies View RelatedWhat Is The Difference NAS And Many Hard Drives Server
Mar 28, 2008i feel the NAS are not very cheap,
it looks likely just a low-level server with many hhds,
but why people not buy a server and put many hhds on it?
Sata Hard Driver: Seaget Or WD
Sep 13, 2008i know the subject may been talked a lot of time,
but i think those thread are too old,
and by the time pass and technology growth,
it may take difference,too.
in my feeling,i like seaget,
but some people tell me WD may be better,
if possible,could you tell me your choose or experience?
for possible,it can include the series type,
for example,WD 500G WD5000AACS...etc.
Software RAID5 Not Booting Up Without All Hard Drives
May 14, 2007I setup a Software RAID5 the following way:
/dev/sda:
1: /boot 101MB
2: software raid ALL
/dev/sdb
1: software raid ALL
/dev/sdc
1: software raid ALL
/dev/sdd
1: software raid ALL
/dev/md0: ext3 mounted as / for all of the software RAID partitions.
I was left to believe this would create redundancy as long as only one drive is removed from the array. Although when I unplug any of the hard drives (one at a time) I get input/output errors and when I try to reboot I get kernel sync errors.
What exactly am I doing wrong when trying to create redundancy? I know that SDA contains the /boot/ partition so it wouldn't boot without that but even if I unplug B,C, and D it still can't sync.
Nearline Sata Drive Performance
Oct 28, 2009We have had some old dell 745n that had sata drives in them in the past. These are the only time we have ever used sata. The performance was terrible and we replaced the sata drives more times in over several years and we ever have with sas/scsi drives.
We are looking to get some new disk backup boxes which we plan to go 600gb sas drives, but might be considering 1tb nearline sata from dell.
I would like to hear from anyone using nearline sata and get feedback on performance and reliability overall. Also if you are using for backups, how many backup jobs are you able to run at the same time before performance drops?
Server With SCSI And SATA Hard Driver
Apr 17, 2008Within 2 servers below, what is faster than:
Server 1:
Primary hard driver: 73GB SCSI 10k (for system, database...)
Secondary hard driver: 160GB SATA (for /home/ directory)
Server 2: 2 x 160GB SATA RAID 1
Shared Hosting Clients' Preference On Hard Drives
May 2, 2009I know SCSI drives are better than SATA, but I wonder if the community will prefer SATA or SCSI especially when you will be paying more for less.
Heres an example.
You can get:
2GB SATA for $5 & 500MB SCSI for $5, which will you choose?
Replacing Or Upgrading Hard Drives...remote Method
Dec 20, 2007I want to try something different on our methods of replacing or upgrading hard drives.
I want to be able to do most of it via our KVM/IP instead of babysitting the server(s) for so long in the DC.
My thoughts are, how can I add the new hard drive in the DC, and move the data over via the KVM/IP. Can this be done with just a raw drive added (no new setup) using DD or even rsync, or is it better to setup a new installation of CentOS on the new drive, and use rsync to move the data over. Then how do I get the proper drive to boot until I go back into the DC to remove the bad or old drive? I'd be interested in how some of you folks are doing this, as far as what's easiest and could be done over the KVM/IP once the new drive is connected.
Or on systems that have 2 drives with cPanel/WHM, how can we temporarily on an emergency basis untilize the backup drive to do a new setup, copy the data over from the drive that is failing, then just replace the bad drive as a backup drive next time you go in the DC? We have an external USB CD in place to allow remote installs...just curious if anyone does something like this or has ideas how we could make this work.
We use cloning software now, but can end up babysitting a clone for a long period in the DC like this.
Win2k3: NTDetect Failed And SATA Hard Disk
Sep 12, 2009trying to get my Win2k3 Standard R2 server to work.
Problem:
I did some Windows update around 3am this morning but during the update process. I lost Remote desktop connection as my machine is do several attempts to connect with the remote server. I cancel the attempt after several try. I figure i can remote desktop back in again if i wait for a bit but I couldn't re-establish the connection with my remote server. So, I drove to the Datacenter to check it out and it turn out the machine have rebooted and I'm stuck with "NTDetect failed" error message. After some googling, I was trying to fix this error by copying NTLDR and NTDetect.COM into C: but when i tried to use the Win2k3 CD to go into Windows Setup and repair. I got an error message telling me that "Setup did not find any hard disk drives installed in your computer...".
After some googling, I found the two Maxtor SATA hard disks might be the problem and one soultion that i found was to disable the SATA or set it to IDE since the motherboard have nvida RAID controller onboard. I check the BIOS and the RAID is set to disabled and then i tried to disable SATA and only enable IDE. It still give me the same error message about not able to find any hard disk.
I'm on my last rope here. I'm short of reformatting the hard disk and do a fresh reinstall but I will like to avoid this.
Does anyone know if cancel Remote desktop connection attempt during Windows update process cause this NTdetect failed problem or something else that might related to my hardware. I can assure you that two SATA hard disks shown on BIOS.
The soultion to NTDecte failed problem seem to be just copying NTLDR and NTdectect.com into C: but since i can't even get to Repair mode during Windows setup with no disk install error. Can someone recommand how to solve this problem?
The motherboard that i use is ASUS M2N-MX SE AM2 NVIDIA GeForce6100 / nForce430 and the BIOS is American Megatrends Inc.
Google Doubts Hard Drives Fail Because Of Excessive Temperature, Usage
Feb 17, 2007Mountain View (CA) - As a company with one of the world's largest IT infrastructures, Google has an opportunity to do more than just search the Internet. From time to time, the company publishes the results of internal research. The most recent project one is sure to spark interest in exploring how and under what circumstances hard drives work - or not.
There is a rule of thumb for replacing hard drives, which taught customers to move data from one drive to another at least every five years. But especially the mechanical nature of hard drives makes these mass storage devices prone to error and some drives may fail and die long before that five-year-mark is reached. Traditionally, extreme environmental conditions are cited as the main reasons for hard drive failure, extreme temperatures and excessive activity being the most prominent ones.
A Google study presented at the currently held Conference on File and Storage Technologies questions these traditional failure explanations and concludes that there are many more factors impacting the life expectancy of a hard drive and that failure predictions are much more complex than previously thought. What makes this study interesting is the fact that Google's server infrastructure is estimated to exceed a number of 450,000 fairly mainstream systems that, in a large number, use consumer-grade devices with capacities ranging from 80 to 400 GB in capacity. According to the company, the project covered "more than 100,000" drives that were put into production in or after 2001. The drives ran at a platter rotation speed of 5400 and 7200 rpm, came from "many of the largest disk drive manufacturers and from at least nine different models."
Google said that it is collecting "vital information" about all of its systems every few minutes and stores the data for further analysis. For example, this information includes environmental factors (such as temperatures), activity levels and SMART parameters (Self-Monitoring Analysis and Reporting Technology) that are commonly considered to be good indicators to describe the health of disk drives.
In general, Google's hard drive population saw a failure rate that was increasing with the age of the drive. Within the group of hard drives up to one year old, 1.7% of the devices had to be replaced due to failure. The rate jumps to 8% in year 2 and 8.6% in year 3. The failure rate levels out thereafter, but Google believes that the reliability of drives older than 4 years is influenced more by "the particular models in that vintage than by disk drive aging effects."
Breaking out different levels of utilization, the Google study shows an interesting result. Only drives with an age of six months or younger show a decidedly higher probability of failure when put into a high activity environment. Once the drive survives its first months, the probability of failure due to high usage decreases in year 1, 2, 3 and 4 - and increases significantly in year 5. Google's temperature research found an equally surprising result: "Failures do not increase when the average temperature increases. In fact, there is a clear trend showing that lower temperatures are associated with higher failure rates. Only at very high temperatures is there a slight reversal of this trend," the authors of the study found.
In contrast the company discovered that certain SMART parameters apparently do have an effect drive failures. For example, drives typically scan the disk surface in the background and report errors as they discover them. Significant scan errors can hint to surface errors and Google reports that fewer than 2% of its drives show scan errors. However, drives with scan errors turned out to be ten times more likely to fail than drives without scan errors. About 70% of Google's drives with scan errors survived the first eight months after the first scan error was reported.
Similarly, reallocation counts, a number that results from the remapping of faulty sectors to a new physical sector, can have a dramatic impact on a hard drive's life: Google said that drives with one or more reallocations fail more often than those with none. The observed average impact on the average fail rate came in at a factor of 3-6, while about 85% of the drives survive past eight months after the first reallocation.
Google discovered similar effects on hard drives in other SMART categories, but them bottom line revealed that 56% of all failed drives had no count in either one of these categories - which means that more than half of all failed drives were put out of operation by factors other than scan errors, reallocation count, offline reallocation and probational counts.
In the end, Google's research does not solve the problem of predicting when hard drives are likely to fail. However, it shows that temperature and high usage alone are not responsible for failures by default. Also, the researcher pointed towards a trend they call "infant mortality phase" - a time frame early in a hard drive's life that shows increased probabilities of failure under certain circumstances. The report lacks a clear cut conclusion, but the authors indicate that there is no promising approach at this time than can predict failures of hard drives: "Powerful predictive models need to make use of signals beyond those provided by SMART."
Invalid Cross-device Link - Additional Hard Drives Linux
Mar 25, 2008OP: Linux Centos
I just got an additional 500GB hard drive added and mounted it to /home2
There are files that are in /home1 (orginal HD) that will need to be constantly moved over to /home2 via a ftp
But i keep getting this error
550 Rename/move failure: Invalid cross-device link
Does anyone have any ideas? I tried changing permissions but no luck also tried mounting the 2nd hard drive within a directory in /home1. Still gives the error.
Hard Drive Performance Measurement
Jul 21, 2008I am trying out all sorts of new drives and raid card adapters because I am finding the 3ware's I have been faithfully using to really suck lately.
We are testing them against areca and adaptec (although I really hate areca from prior bad experience)...
We are using bonnie right now... of course we plan to play around with xen, a couple of domains, prime95, some dd's and then run bonnie too... kind of a stress test.
What's Real SATA2 Hard Drive Performance
Jul 31, 2008how much traffic SATA 2 HDD can handle?
While transfer speed is 300 MB/s, it's really not possible to keep transfering data at those speeds 24/7? Or is it?
Wouldn't network line (100 mbps) die first?
7200 Rpm Sata With Raid 10 Vs 10000 Rpm Sata With Raid1
Dec 19, 2008about the hd,there are two options, the first one is four 7200rpm sata to do raid 10,
the second one is two 10000rpm sata to do raid 1, about the performance, which one will be better?
Do Hosts Use Enterprise Drives Or Desktop Drives
Nov 5, 2009i want to know if there is a difference between enterprise drives and desktop drives and which ones hosts use
View 7 Replies View Related500GB Backup Service
Sep 1, 2008What is a good 500GB backup service?
Other than bqbackup.
New Dreamhost Code 500GB Storage 5 TeraByte BW
Sep 1, 2008While i was surfing on forum i saw some had wanted DreamHost promo code.
Here it is.(if still needed)
{snip} You'll get 50$ discount(maximum available) and totaly 2 free(.com.net.org) domain registration at yearly payments.
DreamHost
* 500 GB Disk Storage
* 5 TB Monthly Bandwidth
* 2 free (com-net-org) Domain
* Reliable hosting since over 10 years.
SATA 7k RAID 1 Vs. 2xSATA 10k Vs. SATA+SAS
Jul 3, 2008I'm currently in the process of ordering a new server and would like to throw another $50-$70 at the default SATA II 7k 250 GB to increase performance. The server will host a site similar to WHT (php, mysql, and some forum traffic ).
There are three options I can get for the price:
1. Add another SATA II 7k 250 GB and set up RAID 1
2. Add a 73GB 15k RPM SA-SCSI and put mySQL on it. No RAID.
3. Toss out the SATA II 7k and take two SATA 10k 150 GB instead. Put mySQL on one of them. No RAID.
Please keep in mind that the question is budget-related (I know I can get more if I spend an extra $200 but that's not what I want ). Which of the above will make me happiest?
Dell Drives In A RAID Array With Non-Dell Drives
Sep 14, 2009I have a couple of Dell 1950s and in one of them, I have 2x Seagate 15K.5s that I purchased through Dell and I also have a spare sitting in my rack in case one goes bad, also from Dell.
I was going to be repurposing one of my other 1950s and was going to get two more 15K.5s for it, but wasn't planning on getting them through Dell (rip off?). This way, could still keep the same spare drive around in case a drive went bad in that system as well.
When I was talking to my Dell rep recently when purchasing another system, their hardware tech said you can't use non-Dell drives with Dell drives in the same RAID array because of the different firmware between them.
Anyone know if it is true? Anyone have any experience with using drives from Dell in conjunction with the same model drives from a third party retailer?