similar to: MTBF of Ext3 and Partition Size

Displaying 20 results from an estimated 700 matches similar to: "MTBF of Ext3 and Partition Size"

2007 Jul 31
1
MTBF Reliability calculations
I'm working on a project involving reliability values (known failure rates) for a system with approximately 700 components with a set cconfiguration. I'm looking to compute a "parts-count" MTBF (mean time between failures) for the system. (See also MIL-HDBK-217) Is there anything in R that can help me with this? Thanks, Eric Jennings QA Technical Assistant Crane
2006 Nov 07
2
Boxplot
Hi, I am new to R and am still trying to get a grip of it. I have data in this format: Run Lab Batch Y 1 1 1 1 608.781 2 2 1 2 569.670 3 3 1 1 689.556 4 4 1 2 747.541 5 5 1 1 618.134 6 6 1 2 612.182 7 7 1 1 680.203 8 8 1 2 607.766 9 9 1 1 726.232 and I want to make a boxplot of the Y values for each
2006 Nov 07
1
Better way to create tables of mean & standard deviations
Hi I'm trying to create tables of means, standard deviations and numbers of observations (i) for each laboratory (ii) for each batch number (iii) for each batch at each laboratory for the attached data. I created these functions: summary.aggregate <- function(y, label, ...) { temp.mean <- aggregate(y, FUN=mean, ...) temp.sd <- aggregate(y, FUN=sd, ...) temp.length <-
2005 Dec 21
1
System Reliability Metrics
I need to calculate some metrics such as Mean Time Between Failure (MTBF), etc (see http://www.cs.sandia.gov/~jrstear/ras for a more complete list). I have observations like start end state 1 2005-11-11 09:05:00 2005-11-11 12:20:00 Scheduled Downtime 2 2005-11-12 13:42:00 2005-11-12 14:45:00 Unscheduled Downtime where each row describes
2006 Sep 19
4
Disk Layout for New Storage Server
We are implementing a ZFS storage server (NAS) to replace a NetApp box. I have a Sun server with two dual Ultra320 PCIX cards connected to 4 shelves of 12 500GB disks each, yielding a total of 24TB of raw storage. I''m kicking around the different ways to carve this space up, balancing storage space with data integrity. The layout that I have come to think is the best for me is to
2012 Nov 23
1
Astro Radio Opus Streams
Hi All, We've been happily running Opus for last two months without a hitch for Astro. If you're interested - http://players.radioactive.sg/astro/ All the best, Andrew -- Andrew Crothers Managing Director RADIOactive Pte Ltd ? http://radioactive.sg
2001 May 12
4
Erase the source file open; specify a tempfile name option
I'm curious how to go about submitting a suggestion that affects both the original BSD version and the portable release. A few days ago I sent off a BSD-relative patch to openssh at openssh.com. Is this the right thing to do? I didn't hear anything back, but it's only been 3 days, so I'm probably just being too antsy. In the meantime, maybe someone else out there would like to
2007 May 07
5
Anaconda doesn't support raid10
So after troubleshooting this for about a week, I was finally able to create a raid 10 device by installing the system, copying the md modules onto a floppy, and loading the raid10 module during the install. Now the problem is that I can't get it to show up in anaconda. It detects the other arrays (raid0 and raid1) fine, but the raid10 array won't show up. Looking through the logs
2008 Feb 05
4
Enterprise-class monitoring system for CentOS and Win2k3 server
Can anyone recommend an enterprise-class monitoring system for both Linux and Windows servers? Here are my requirements: SNMP trap collection, ability to import custom MIBs isup/isdown monitoring of ports and daemons Server health monitors (CPU, Disk, Memory, etc) SLA reporting with nice graphs Pager/Email/SMS alerts with groups, filters and escalations Built-in MTBF and MTTR reporting Robust
2010 Apr 27
42
Performance drop during scrub?
Hi all I have a test system with snv134 and 8x2TB drives in RAIDz2 and currently no Zil or L2ARC. I noticed the I/O speed to NFS shares on the testpool drops to something hardly usable while scrubbing the pool. How can I address this? Will adding Zil or L2ARC help? Is it possible to tune down scrub''s priority somehow? Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 roy at
2010 Nov 15
1
... predict.coxph
>If you are looking at radioactive decay maybe but how often do >you actually see exponential KM curves in real life? Exponential curves are rare. But proportional hazards does not imply exponential. > A trial design could in fact try to get all the control sample to "event" at the same time if enough was known about prognostic factors and natural trajectory You are a
2006 Mar 30
1
disk drive sparing - questions not answers
I understand that ZFS provides fault data, via the zpool status command, that would (probably ??) allow a knowledgeable[0] zfs admin to determine (manually) when a zfs hardware element (today that''s usually called a "disk drive") might need "maintainence" or might need to be replaced. And there are sufficient features/facilities available in the current (b36+) release
2016 Oct 28
2
Re: Disk near failure
On Fri, 28 Oct 2016 18:50, Alessandro Baggi wrote: > Il 28/10/2016 16:28, Valeri Galtsev ha scritto: >> On Fri, October 28, 2016 2:42 am, Alessandro Baggi wrote: >> > Il 27/10/2016 19:38, Yamaban ha scritto: >> > > For my personal use I would replace that Drive asap. >> > > - There is no warranty for it anymore (time since buy) >> > > -
2009 Aug 06
10
RAID[56] status
If we''ve abandoned the idea of putting the number of redundant blocks into the top bits of the type bitmask (and I hope we have), then we''re fairly much there. Current code is at: git://, http://git.infradead.org/users/dwmw2/btrfs-raid56.git git://, http://git.infradead.org/users/dwmw2/btrfs-progs-raid56.git We have recovery working, as well as both full-stripe writes
2009 Mar 17
4
Plastic Water Bottles
The plastics industry says polycarbonate bottles are safe. http://www.bisphenol-a.org/about/faq.html#g I'm sure Maggie and here friends would say ALL plastic bottles are very dangerous. This lady seems to be at a reasonable middle ground. http://trusted.md/blog/vreni_gurd/2007/03/29/plastic_water_bottles Polycarbonate plastics the kind of bottle you bought contains BPA. "In 2006 Europe
2004 Jul 22
1
RAID/SCSI/IDE/SATA and a TE405P (or T100P) c ard. Should I expect problems?
Hello, We use all SCSI PCI card hardware RAIDs on all 4 of our production Asterisk servers. They all have Digium quad T1 cards and they all have from 2 to 4 T1s hooked up to them. We have had no noticable problems with dropped calls/poor quality. What are you looking to do with this system? what kind of traffic will be going through these 4 T1s? MATT--- -----Original Message----- From: Deon
2005 May 04
1
Multiple Logins - Single Mail Account
I have a mail account which needs to be accessed by 4-5 people simultaneously through IMAP. As of now I have configured it on the respective clients using the same username and password so we have multiple people accessing the same account through their mail clients simultaneously and it is working flawlessly. Is this alright or can it lead to some problems or corruption of data later ? What is
2008 Feb 25
2
Update from 1.0.10 -> 1.1rc1: Odd "quota exceeded" output
>From my log: Feb 25 14:53:26 postamt postfix/local[22546]: 0EAA8220697: to=<username at postamt.charite.de>, relay=local, delay=0.61, delays=0.16/0.04/0/0.42, dsn=5.7.0, status=bounced (permission denied. Command output: Warning: Growing pool 'Environment' with: 4096 Quota exceeded ) I'm not sure if "Warning: Growing pool 'Environment' with: 4096" should
2010 Apr 26
23
SAS vs SATA: Same size, same speed, why SAS?
I''m building another 24-bay rackmount storage server, and I''m considering what drives to put in the bays. My chassis is a Supermicro SC846A, so the backplane supports SAS or SATA; my controllers are LSI3081E, again supporting SAS or SATA. Looking at drives, Seagate offers an enterprise (Constellation) 2TB 7200RPM drive in both SAS and SATA configurations; the SAS model offers
2016 Oct 28
4
Disk near failure
On Fri, October 28, 2016 2:42 am, Alessandro Baggi wrote: > Il 27/10/2016 19:38, Yamaban ha scritto: >> For my personal use I would replace that Drive asap. >> - There is no warranty for it anymore (time since buy) >> - You can't buy it new anymore (discontinued) >> - There are more reliable drives available. >> >> I'd go for a Samsung Evo 850, that