similar to: SAS storage arrays, C6, and SES lights

> > > > On 10/11/11 7:29 AM, Arun Khan wrote: >>> that requires specific configuration to suit whatever drive interconnect >>>> you have. >> Does these bays have a connector (+ cable) that is connected to the >> motherboard or RAID card to control the HDD LEDs in the bay? >> (sorry if this appears basic but I have no experience with such

On 7/26/2016 2:56 PM, m.roth at 5-cent.us wrote: > Yeah, well, the thing is, for years I've just been shoving ordinary SATA > drives into the same server, to use to copy from other machines via rsync, > getting a drive ready to replace in another server. I've never had trouble > with SATA. This is the first time with an SAS drive. mixing SAS and SATA on the same backplane can

Hi, John, John R Pierce wrote: > On 7/12/2016 10:19 AM, m.roth at 5-cent.us wrote: >> Got an older Dell R410, with an LSI 1068E PCI-Express Fusion-MPT SAS >> (rev 08). It*appears* that a) trying MegaRaid, and b) from what I'm >> googling, that what I need are mptfusion-related packages. >> Unfortunately, yum shows me nothing available in base, epel, or >>

Hi, I know (from the zfs-discuss archives and other places [1,2,3,4]) that a lot of people are looking to use zfs as a storage server in the 10-100TB range. I''m in the same boat, but I''ve found that hardware choice is the biggest issue. I''m struggling to find something which will work nicely under solaris and which meets my expectations in terms of hardware.

Greetings, We''re trying out a new JBOD here. Multipath (mpxio) is not working, and we could use some feedback and/or troubleshooting advice. The OS is oi151a7, running on an existing server with a 54TB pool of internal drives. I believe the server hardware is not relevant to the JBOD issue, although the internal drives do appear to the OS with multipath device names (despite the fact

During the diagnostics of my SAN failure last week we thought we had seen a backplane failure due to high error counts with ''lsiutil''. However, even with a new backplane and ruling out failed cards (MPXIO or singular) or bad cables I''m still seeing my error count with LSIUTIL increment. I''ve got no disks attached to the array right now so I''ve also

Is anyone running either the newish Adaptec 5805 or the new LSI (3ware) 9750 sas raid controllers in a production environment with Centos 5.3/5.4? The low price of these cards makes me suspicious, compared to the more expensive pre-merger 3ware cards and considerably more expensive Areca ARC-1680. I've been 'burned' by the low cost of Promise raid cards (just as this group pointed

Hi all, Does anyone know how to control a hard drive light from Linux? I'm building a 24bay Linux File server which will run software RAID and I need an easy way for the engineers to see which HDD has gone bad. Most of our NAS devices has 2 lights on the hard drive cages and they automatically signal a bad one (reg light, light constant on , etc) but I can't figure out how todo this from

On Sat, January 21, 2017 12:16 am, Keith Keller wrote: > On 2017-01-20, Valeri Galtsev <galtsev at kicp.uchicago.edu> wrote: >> >> Hm, not certain what process you describe. Most of my controllers are >> 3ware and LSI, I just pull failed drive (and I know phailed physical >> drive >> number), put good in its place and rebuild stars right away. > > I

Dear all Sorry if it''s kind of off-topic for the list but after talking to lots of vendors I''m running out of ideas... We are looking for JBOD systems which (1) hold 20+ 3.3" SATA drives (2) are rack mountable (3) have all the nive hot-swap stuff (4) allow 2 hosts to connect via SAS (4+ lines per host) and see all available drives as disks, no RAID volume. In a

R 2.3 Windows XP I am trying to understand lme. My aim is to run a random effects regression in which the intercept and jweek are random effects. I am comparing output from SAS PROC MIXED with output from R. The point estimates and the SEs are the same, however the DFs and the p values are different. I am clearly doing something wrong in my R code. I would appreciate any suggestions of how I can

On 7/26/2016 2:38 PM, Peter wrote: > On 27/07/16 09:11,m.roth at 5-cent.us wrote: >> >This is... odd. Got a 6.8 box, a Dell R320 lspci tells me >> >01:00.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS 2008 >> >[Falcon] (rev 03) >> >so it*should* accept an SAS drive. I've got a Cheetah that's a few years >> >old, and having

On 08/30/2015 12:02 PM, Mike Mohr wrote: > In my experience the mass market HBAs and RAID cards typically do support > only 8 or 16 drives. For the internal variety in a standard rack-mount > server you'll usually see either 2 or 4 iPass cables (each of which support > 4 drives) connected to the backplane. The marketing material you've > referenced has a white lie in it:

Is it possible or will there be any problems with using mdraid on top of mdraid? specifically say mdraid 1/5 on top of mdraid multipath. e.g. 4 storage machines exporting iSCSI targets via two different physical network switches then use multipath to create md block devices then use mdraid on these md block devices The purpose being the storage array surviving a physical network switch

On Sat, 2020-11-14 at 18:55 +0100, Simon Matter wrote: > > On Wed, 2020-11-11 at 16:38 -0700, Warren Young wrote: > > > On Nov 11, 2020, at 2:01 PM, hw <hw at gc-24.de> wrote: > > > > I have yet to see software RAID that doesn't kill the performance. > > > > > > When was the last time you tried it? > > > > I'm currently using

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

Hey, I installed 2 new data servers with a big (12TB) RAID6 mdraid. I formated the whole arrays with bad blocks checks. One server is moderately used (nfs on one md), while the other not. One week later, after the raid-check from cron, I get on both servers a few block_mismatch... 1976162368 on the used one and a tiny bit less on the other...? That seems a tiny little bit high... I do the

Dear All, I am trying to use the function ses from the forecast package. >From its help I have : Usage: ses(y, h = 10, level = c(80, 95), fan = FALSE, initial = c("optimal", "simple"), alpha = NULL, lambda = NULL, biasadj = FALSE, x = y, ...) My query is that if I do not mention the initial value will its default value be "optimal". A MWE would be

I'm trying to replicate a time-series cross-sectional analysis (countries over years) with SEs clustered by country. ?The original analysis was done in Stata 10 with: xtreg [DV] [IVs] fe cluster(country). Using plm() in R (cran.r-project.org/web/packages/plm/index.html), I've replicated the coefficients. I sought to estimate country-clustered SEs with vcovHC(), and tried a variety of

Hi, Does anyone have experiences about ARC-1883I SAS controller with CentOS7? I am planning to have RAID1 setup and I am wondering if I should use the controller's RAID functionality which has 2GB cache or should I go with JBOD + Linux software RAID? The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034 7200rpm SAS/12Gbit 128 MB If hardware RAID is preferred, the