search for: bbu

Hi all. We just put a relative large server in operation (for our measures ;-) ), a 4x Dual Core / Intel with 16GB Ram and a 3ware 9550SX SATA-RAID with 4 drives. Operating system for the Dom0 is an up-to-date gentoo linux. Everything runs really fine, there are 4 Domu''s running, 1x gentoo and 2x debian and 1x Windows Server 2003. DomU''s are running blazing fast in normal

...0.06.00-rh1 CLI Version: 8.07.14 Hardware Controller ProductName : LSI MegaRAID SAS 9260-4i(Bus 0, Dev 0) SAS Address : 500605b008a30fc0 FW Package Version: 12.14.0-0167 Status : Optimal BBU BBU Type : iBBU Status : Healthy Enclosure Product Id : SGPIO Type : SGPIO Status : OK . . . -- Philippe BOURDEU d'AGUERRE AIME - Campus de l...

Has anyone worked with a x4500/x4540 and know if the internal raid controllers have a bbu? I''m concern that we won''t be able to turn off the write-cache on the internal hds and SSDs to prevent data corruption in case of a power failure. -- This message posted from opensolaris.org

Hi, I've got a new server with a 3ware 9550SXU with the Battery. I am using FreeBSD 7.0-Release (tried both 4BSD and ULE) using AMD64 and the 3ware performance for writes is just plain horrible. Something is obviously wrong but I'm not sure what. I've got a 4 disk RAID 10 array. According to 3dm2 the cache is on. I even tried setting The StorSave preference to

...the first connector in the stack is a dummy) 3) They are only on the first release of the software (9.3.0, the first- ship release, didn't work, and they released 9.3.0.1). At some point they will ship a unified release for the 9550 and 9500, but that's a ways off 4) no BBU support (yet).

Greetings, I am looking for a hardware raid card that supports up to 4 SATA II hard disks with hot swap (compatible raid cage) I have short listed two LSI/3Ware cards: 1. 9750-4i 2. 9650SE-4LPML Both appear to be well supported in Linux. I would appreciate your personal experience with the CLI tools provided by LSI. Can they be configured to send email for disk failures or SMART errors? Is

On 29 August 2007, "Ross S. W. Walker" <rwalker at medallion.com> wrote: > Message: 39 <snip> > I wouldn't worry too much about the OS HD configuration, you are > always going to want RAID1 for the OS, whether software or hardware. > > Reason I say not to worry too much about the OS HD config is because > you are almost certainly going to put the

With all the recent discussion of SSD''s that lack suitable power-failure cache protection, surely there''s an opportunity for a separate modular solution? I know there used to be (years and years ago) small internal UPS''s that fit in a few 5.25" drive bays. They were designed to power the motherboard and peripherals, with the advantage of simplicity and efficiency

I have a rather large box (2x8-core Xeon, 96GB RAM) where I have a couple of disk arrays connected on an Areca controller. I just added a new external array, 8 3TB drives in RAID5, and the testing I'm doing right now is on this array, but this seems to be a problem on this machine in general, on all file systems (even, possibly, NFS, but I'm not sure about that one yet). So, if I use

Hi, I'm currently looking for a RAID controller with BBU/CacheVault and while LSI MegaRaid controllers worked well in the past apparently they are no longer supported in RHEL 8: https://access.redhat.com/discussions/3722151 Does anybody have recommendations for for hardware controllers with cache that should work in both CentOS 7 and 8 out of the box?...

...d it often defaults to cache=writeback: https://www.suse.com/documentation/sles11/book_kvm/data/sect1_1_chapter_book_kvm.html Which is correct? How is the cache mode set by default (if cache= is not specified)? My second question is can cache=none be used safely on a local ext4 filesystem with no BBU? Since ext4 uses barriers, would writing to these qcow2 image files be safe? The kernel documentation about barriers states that "Write barriers enforce proper on-disk ordering of journal commits, making volatile disk write caches safe to use, at some performance penalty". Does this apply...

...has quite good hardware. When I use iostat -x, I find that the %util of the device is averaging 80%. Here is the hardware involved: Oracle Server: HP Proliant 380DL + MSA70 16 GB ram 2 x Quad-core Xeons E5345 2.33 Ghz 9 RAID 10 volumes on 32 72G, 15K rpm SAS disks 1X Smart Array P400 w/512 MB BBU 1X Smart Array P800 w/512 MB BBU Database Server HP Proliant 360DL 2 x Quad-core Xeons E5345 2.33 Ghz 1 RAID 5 volume on 6 146 GB, 10K rpm SAS disks 1X Smart Array P400 w/512 MB BBU Any help or suggestions welcome. Regards, Ugo

...6-drive case with only a 12-way card. :-) - Return the 3Ware and order two of the 8-way cards which are half-height. This means I love some of my space now however as I have to have an extra spare drive per card. - Get a PCI-E riser. The riser option I like, except I also have the BBU unit for my RAID card meaning I need to ensure that I have enough clearance and support for it when the card is mounted horizontally. You can mount the battery elsewhere, but not the logic module... Most of the PCI-E 8x risers I've seen out there seem to be pretty small profile and I'm no...

Hello listmates, I would like to build a 12-15 TB RAID 5 data server to run under ContOS. Any recommendations as far as hardware, configuration, etc? Thanks. Boris.

Your question is difficult to parse. Typically RAID and JBOD are mutually exclusive. By "flash-backed", do you mean a battery backup unit (BBU) on your RAID controller? On Mon, Apr 9, 2018 at 8:49 AM, Vincent Royer <vincent at epicenergy.ca> wrote: > >> Is a flash-backed Raid required for JBOD, and should it be 1gb, 2, or 4gb >> flash? >> > > Is anyone able to clarify this requirement for me? > > &...

Happy new year ! We have a SuperMicro server with a LSI MegaRAID 9260-4i controller. Since Centos 6.6 update (kernel 2.6.32-504), the controller doesn't initialize at boot. Reverting to kernel 2.6.32-431 allows server to boot fine. The server can't boot due to a bug in LSI megaraid module. Boot log ends by a lot of lines: RESET_GEN2: retry=xxx, hostdiag=a4 I tried Centos 6.6

...CLI Version: 8.02.16 Hardware Controller ProductName : LSI MegaRAID SAS 9261-8i(Bus 0, Dev 0) SAS Address : 500605b003bbef10 FW Package Version: 12.12.0-0046 Status : Need Attention BBU BBU Type : iBBU Status : Remaining Capacity is Low Enclosure Product Id : SAS2X36 Type : SES Status : OK Product Id : SGPIO...

On 7/4/2015 1:55 PM, John R Pierce wrote: > On 7/4/2015 1:02 AM, Jatin Davey wrote: >> [Jatin] I am still reading through the documentation of my server to >> find out the battery backup in it. Is there any command within the OS >> that i can use to find out this information ? > > I've never heard of a UPS built into a server, every one I've ever > seen

I have a trio of servers that like to reboot during high disk / network IO operations. They don't appear to panic, as I have kernel.panic = 0 in sysctl.conf. The syslog just shows normal messages, like samba complaining about browse master and then just syslogd starting up. The machines seem to crash when I'm not near the console, usually when I'm trying to pull data off them to

Hi list, during the last days there was a discussion going on about the stability of XFS; though I myself used XFS heavily and didn't run into issues yet, I'd like to ask something *before* we create our next generation data storage backend... Les Mikesell wrote in [0] about issues in the combination of XFS and LVM -- however, it was being discussed in context of using 32bit kernels.