![lsi megasr lsi megasr](https://www.intel.com/content/dam/support/us/en/images/motherboards/server/sb/img/cs034117_1.gif)
However I can't find it on a Nec 120Rg-1 so I had to deal with that crap.
#LSI MEGASR SOFTWARE#
Some users reported a switch available on the motherboard to disable software RAID5 and use the card as a regular FusionMPT card. Real FusionMPT: 02:08.0 SCSI storage controller : LSI Logic / Symbios Logic SAS1068 PCI-X Fusion-MPT SAS ! (rev 01)įake MegaRAID : 0d:05.0 SCSI storage controller : LSI Logic / Symbios Logic SAS1068 PCI-X Fusion-MPT SAS ! (rev 01)ġ000:0054 is okay, 1000:0055 is a fake MegaRAID card. RAID5 is supported through a proprietary kernel module.īoth FusionMPT and this fake MegaRAID looks like this in lspci:Ġd:05.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068 PCI-X Fusion-MPT SAS (rev 01)īut if you run lspci -nn you will notice this:
#LSI MEGASR PLUS#
In fact this card has FusionMPT hardware plus MegaRAID BIOS.
#LSI MEGASR SERIES#
![lsi megasr lsi megasr](https://cloudhba.com/gallery_gen/b82a9176e5be4094eda58cc980314fe5.jpg)
It uses SAS or SATA connectors and can be found in many OEMs servers like Dell's. LSI MegaRAID SAS: This is current high-end serie by LSI.See: LSIMegaRAID for informations about theses cards. Thoses are fully hardware RAIDs controllers supporting RAID5, at least, with various SCSI interfaces.ĭeprecated, but still found in many old servers. LSI MegaRAID: Theses are the old high-end cards from LSI.See: LSIFusionMPTSAS2 for information about theses cards. LSI FusionMPT SAS2: This is the new version of the FusionMTP cards.ĭell PERCH H200/H700 are based on MPT SAS2 for example.See: LSIFusionMPT for information about theses cards. LSI FusionMPT: Theses are the cheap cards usually found in two-drive-bays-only servers.
#LSI MEGASR DRIVERS#
LSI sells several model of cards which do not use the same drivers nor the same tools. In example, nearly all current Dell servers have LSI cards re-branded as Dell PERC. Thank you very much for any help you can give.LSI ( ) is probably the most used hardware raid manufacturer. Right now I am using 1 & 2 for the PowerVault, would 2 & 3 offer any changes good/bad/otherwise? I assume 0/1 are controlled by one chip, 2/3 by another?ģ) Is it normal to need so many Concurrent IO's (256) or on HD Speed, a 16MB Block size, to max out my read speed? I have talked to a friend with a 14xRaid10 SATA RAID setup that does not need anywhere near 256IOs or 16MB BlockSize to get their peak speeds. I have also tried using HD-Speed from I get similiar results to IO Meter sequential tests if I set my block size to 1MB (16MB for read).ġ) Primary Question, What is up with my write speed?Ģ) Is there any benefit to what channels I use on my Quad Channel controller. I also understand that my speed should go down on writing, but with a Single Drive Speed (2xRaid1) I can get 80MB/sec sustained (vs 90MB for read), but with 14xRaid10 I only get 145? That does not add up. I understand WRITE-BACK is supposed to be the faster mode because of the lazy writes. I tried with WRITE-BACK and WRITE-THROUGH with seemingly very little difference.
![lsi megasr lsi megasr](http://hakankaplanoglu.com.tr/wp-content/uploads/2017/08/Screenshot_6-1.png)
I am using IO Meter with unpartitioned drives for testing:ĨK Streaming Read test, I peak with 60,894 IOps (475MB/sec) at 256 Concurrent IO's.ĨK Streaming Write test, I peak with 18,636 IOps (145MB/sec) at 32 Concurrent IO's. Two external connections from Channel 1 & 2 of Raid ControllerĬhannel 0 is being used for internal drives on 2850 for OS and Hotspares. LSI MegaRAID 320-4X (Quad Channel) 256MB with BBU And, no it's not just a simple WRITE-BACK fix either =) My new SCSI RAID setup is performing very poorly on write speeds and I don't understand why.