similar to: disk drive sparing - questions not answers

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

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

Hi Yamaban, Great expalanation. I think you know how to buy an ssd. There is no doubt about samsung ssds quality vs other. My question about neutron was to get your opinion about this product. My doubt was about differences between slc, mlc and tlc. Mlc endurance respect tlc is better and I though that the mlc of neutron gives me more endurance respect to the tlc. From a technic point of view,

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

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) >> > > -

for s10u2, documentation recommends 3 to 9 devices in raidz. what is the basis for this recommendation? i assume it is performance and not failure resilience, but i am just guessing... [i know, recommendation was intended for people who know their raid cold, so it needed no further explanation] thanks... oz -- ozan s. yigit | oz at somanetworks.com | 416 977 1414 x 1540 I have a hard time

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

Hi All, On several of my servers I seem to have a high rate of server crashes do to file system errors. So I have some questions related to this: Is there any Mean Time Between Failure ( MTBF) data for the ext3 file-system? Does increased partition size cause a higher risk of the partition being corrupted? If so, is there any data on the ratio between partition size and the likely hood of

Hello, does anybody know about an existing skill-based routing solution for asterisk? I found only some theoretical documents on voip-info.org. I would like to have finer control over who can get which call in which order. Example: Several operators with several topics. Each operator may have a given knowledge-base for given topic. Topics may be weighted in question of complexity as well. Some

Size/Speed/write cycles have gone way up, price has gone way down. More common than CompactFlash and no need for an adapter. So is it feasible to run an Asterisk server on something like this? With a MTBF of 1million write cycles coupled with dynamic wear management on a 4Gig USB drive, lifetime is a non-issue. Just wondering how well it works, if it works.

FYI, Seagate has announced a new enterprise SSD. The specs appear to be competitive: + 2.5" form factor + 5 year warranty + power loss protection + 0.44% annual failure rate (AFR) (2M hours MTBF, IMHO too low :-) + UER 1e-16 (new), 1e-15 (5 years) + 30,000/25,000 4 KB read IOPS (peak/aligned zero offset) + 30,000/10,500 4 KB write IOPS (peak/aligned zero offset)

From: Bruno Delbono <bruno.s.delbono at mail.ac> > I'm really sorry to start this thread again but I found something very > interesting I thought everyone should ^at least^ have a look at: > http://uadmin.blogspot.com/2005/06/4-dual-xeon-vs-e4500.html > This article takes into account a comparision of 4 dual xeon vs. e4500. > The author (not me!) talks about "A

I would prefer the behavior was different to what it is of I/O stopping. The argument I heard for the long 42 second time out was that MTBF on a server was high, and that the client reconnection operation was *costly*. Those were arguments to *not* change the ping timeout value down from 42 seconds. I think it was mentioned that low ping timeout settings could lead to high cpu loads with many

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

ZFS fans, I''m preparing some analyses on RAS for large JBOD systems such as the Sun Fire X4500 (aka Thumper). Since there are zillions of possible permutations, I need to limit the analyses to some common or desirable scenarios. Naturally, I''d like your opinions. I''ve already got a few scenarios in analysis, and I don''t want to spoil the brain storming, so

OK, so killall seems to be ok after several attempts i.e. iops do not stop on VM. Reboot caused I/O errors after maybe 20 seconds since issuing the command. I will check the servers console during reboot to see if the VM errors appear just after the power cycle and will try to crash the VM after killall again... -ps On Fri, Sep 8, 2017 at 12:57 PM, Diego Remolina <dijuremo at gmail.com>

Anyone know what I'm doing wrong here? I'm following the instruction here: http://www.winehq.org/download/deb, but when I try to add the repository's key to your system's list of trusted APT keys I get the error "invalid packet". TIA -Adam ======================================== adam at linnorm:~/downloads$ cat Scott\ Ritchie.gpg -----BEGIN PGP PUBLIC KEY

> The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034 > 7200rpm SAS/12Gbit 128 MB Sorry to hear that, my experience is the Seagate brand has the shortest MTBF of any disk I have ever used... > If hardware RAID is preferred, the controller's cache could be updated > to 4GB and I wonder how much performance gain this would give me? Lots, especially with slower

Hi all, I''m putting together a OpenSolaris ZFS-based system and need help picking hardware. I''m thinking about using this 26-disk case: [FYI: 2-disk RAID1 for the OS & 4*(4+2) RAIDZ2 for SAN] http://rackmountpro.com/productpage.php?prodid=2418 Regarding the mobo, cpus, and memory - I searched goggle and the ZFS site and all I came up with so far is that, for a

Hi all, I''m putting together a OpenSolaris ZFS-based system and need help picking hardware. I''m thinking about using this 26-disk case: [FYI: 2-disk RAID1 for the OS & 4*(4+2) RAIDZ2 for SAN] http://rackmountpro.com/productpage.php?prodid=2418 Regarding the mobo, cpus, and memory - I searched goggle and the ZFS site and all I came up with so far is that, for a