Do we need any modifications to mrsas 4 in order to support the syntax like: Although multiple switching is possible, it is not recommended. Want to link to this manual page? FreeBSD has a cam 4 layer which attaches storage devices and provides a common access mechanism to storage controllers and attached devices. Download in other formats: Server is located remotely, so hard to tell what is the root cause.
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To change the firmware fault check timer value for a specific mrsas driver instance, set the following tunable value in loader. To continue, add one or more ‘-T permissive’ options. Now server reboots on issuing identify command. FreeBSD has a cam 4 layer which attaches storage devices and provides a freehsd access mechanism to storage controllers and attached devices.
Opened 2 freebse ago Last modified 15 months ago. LSI’s policy is to provide priority to the mfi 4 driver to detect MR-Fusion cards, but allow for the ability to choose the mrsas driver to detect MR-Fusion cards.
I will attach my patch to this ticket. Show comments Show property changes.
From what i see – adding megaraid or mrsas? For those customers who are using a MR-Fusion controller for the first time, LSI recommends using the mrsas driver and setting hw. LSI recommends setting hw.
FreeBSD Manual Pages
Recommended and supported driver for this newer controller is mrsas 4 and old mfi 4 driver is neither supported by LSI nor actively developed, it supports new controllers in some obsolete ineffective way. Skip site navigation 1 Skip section navigation 2 Header And Logo. Need to find some time to play with dtrace and find the problem As usual – help is wanted. This behavior is Functions As Designed and the user needs to change the fstab 5 entry manually if they are doing any experiments with mfi 4 and mrsas interoperability.
By default, the mfi 4 driver will detect these controllers. The following bits have the described effects: Can anything be done about this? Changing the default behavior is well tested under most conditions, but unexpected behavior may pop up if more complex and unrealistic operations are executed by switching between the mfi 4 and freebse drivers for MR- Fusion.
Dear chrfrankethank you much for your responsive reaction.
Although multiple switching is possible, it is not recommended. TODO The driver does not support big-endian architectures at this time. Download in other formats: I have smartctl 6. Ok, i got access to such hw one of my BSD servers works with a such controller and will try to work on this.
mfi driver performance too bad on LSI MegaRAID SAS i
The mfi 4 driver does not understand the cam 4 layer and it directly associates storage disks to the block layer. The mrsas freebs is cam 4 aware and devices associ- ated with mrsas can be seen using camcontrol 8. Server is located remotely, so hard to tell what is the root cause. I badly need to monitor S. Powered by Trac 1. Best think is to implement smth like rreebsd which exports drives. Switching drivers is designed to happen only one time. There is a native ioctl interface defined here: Now what I get: If someone interesting to see progress on this ticket – please provide me ssh access to hardware: Last modified 15 months ago.