To fully utilize the SCSI bus and the devices on it, requires much more concurrency. Block Move Instruction Support – Doubles the speed of certain sequencer operations. This restriction applies to all EISA and many motherboard configurations. I would guess this relates to the recent ‘retpoline’ patch to the Linux kernel to address the Spectre vulnerabilities. This confuses the drive and hangs the bus. In the mean time their recommendation is to use their pre-compiled Ubuntu binary which is built to work with the linux-image The SCB contains all of the information required by the controller to process a transaction.
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Performance and feature sets vary throughout the aic7xxx product line. Block Move Instruction Support – Doubles the speed of certain sequencer operations.
Using the SCBs in a straight ubunntu manner would only allow the driver to handle as many concurrent transactions as there are physical SCBs. So far I have found the only solution to this issue is to roll back to kernel version v4. Multi-function Twin Channel Device – Two controllers on one chip. It should also be noted Microsemi also provide a precompiled binary for Ubuntu A method for configuring dual role mode should be provided.
In the mean time their recommendation is to use their pre-compiled Ubuntu binary which is built to work with the linux-image The ubuntuu feature table lists the number of SCBs that can be stored in on-chip memory.
Adaptec – Ubuntu 10
To fully utilize the SCSI bus and the devices on it, requires much more concurrency. I have been given an incident ID: Note that wide and twin channel features, although always supported by a particular chip, may be disabled in a particular motherboard or card design.
For example, a value of 0x25, would enable target mode on units 0, 2, and ubunhu. A value of 0x8a enables it for units 1, 3, and 7. Sign up using Facebook. Since upgrading from Linux kernel v4. Queuing Registers – Allows queueing of new transactions without pausing the sequencer.
Adaptec RAID aacraid driver issue in Ubuntu – Ask Ubuntu
The solution to this problem is SCB Paginga concept similar to memory paging. I would guess this relates to the recent ‘retpoline’ patch to the Linux kernel to address the Spectre vulnerabilities. The following table provides a comparison of the different chips supported by the ahc driver.
Ubuntu 64bit and adaptec raid i2o 1020s Raid controller
Reselection in target mode fails to function correctly on all high voltage differential boards as shipped by Adaptec. The SCBs for disconnected transactions are only of use to the controller when the transfer is resumed.
Sign up using Email and Password. Otherwise, the state of the most recently disconnected and therefore most likely to stay disconnected SCB is saved, via dma, to host memory, and the local SCB reused to start the new transaction. Most modern motherboards perform the initialization ununtu and work fine with this option enabled. This allows the controller to queue up to transactions regardless of the amount of SCB space.
Tagged Queuing is not supported in target mode. Although the Ultra2 and Ultra products have sufficient instruction ram space to support both the initiator and target roles concurrently, this configuration is disabled in favor of allowing the target role to respond on multiple target ids. Home Questions Tags Users Unanswered.