Adaptec asr 5805 server 2003 driver

May 17, 4: I stopped an ibm x series server to clean it out. I have 4 disks attached and the FreeBSD system installed. The old disks slowly started to report S. One of the disks broke and after the replacement the Controller did not pick up on it, did not start the servet The four disks are all the same model configured as a Adaptec fails to rebuild array Yesterday one of the disks in RAID 1 mirror attached to Adaptec died and was replaced new one but after about 2 hours of rebuilding array went offline.

Jonathon Reinhart 1 1 We ordered a new one. T errors so I replaced first one, rebuild array and then other one and rebuild AlexD 4, 2 15 Is this normal, or is this a fault? Sergei Ousynin 23 4. Adaptec Storage Manager — remote clients We have two servers that have Adaptec cards. Is it okay to shut down the raid for Mike H 16 2. The unified architecture implies unified specifications.

The four-port model has half the standard amount of memory while the other models each have the following: a dual-core 1. By the way, the previous series supported up to devices only. It means that Adaptec has not only endowed the new series with faster processors but also improved the firmware. Few users are going to encounter them, but anyway. The fifth series and the second series, too, for that matter supports up to 64 arrays on one controller the third series supports only 24 arrays , up to disks in one RAID0 array, and up to 32 disks in rotated parity arrays RAID5 and RAID6.

We guess a bit of clarification is necessary here. How do they work then? However, not the whole disks but certain blocks of the disks are mirrored in them. The following diagram makes the point clearer the letter M denotes a mirror block.

So, what do we have in the end? You lose the same disk capacity as with the other mirroring array types, i. RAID10 is better in terms of data security: the number of disks being equal, it can survive a failure of two disks at once in some cases. Thus, the main feature of RAID1E is that it allows building a mirroring array out of an odd number of disks and provides some performance benefits, which may come in handy if your controller cannot read from both disks in ordinary mirrors simultaneously.

And these stripes rotate, meaning that they are distributed uniformly among all the disks of the array. This disk does not wait for a failure to happen, as an ordinary replacement disk does, but takes part in the operation of the working array. Data is located as stripes on all the disks of the array including the replacement disk while the capacity of the replacement disk is distributed uniformly among all of the disks in the array.

Thus, the replacement disk becomes a virtual one. The disk itself is utilized but its capacity cannot be used because it is reserved by the controller and unavailable for the user.

In the earlier implementation called RAID5E this virtual capacity was located at the end of each disk. To make the point clearer, we suggest that you take a look at the diagram where P1, P2, P3, P4 are the checksums of the appropriate full stripes while HS is the uniformly distributed capacity of the replacement disk.

What are the benefits of this approach? The drawback of such arrays is obvious, too. The replacement disk is bound to the array.

So if you build a few arrays on one controller, you will have to dedicate one replacement disk for every of them, which increases your costs and requires more room in the server.

Thanks to high integration Adaptec has made the controllers rather short physically. The 4- and 8-port models are even low-profile. The BBU does not occupy an expansion slot in your system case but is installed at the back of the controller itself. The BBU is actually installed on a small daughter card which in its turn is fastened to the controller with plastic screws. We strongly recommend you using a BBU because data is usually too important to risk losing it for the sake of paltry economy.

Moreover, deferred writing is highly important for the performance of RAID arrays as we learned in our test of a Promise controller that worked without a BBU. Enabling deferred writing without a BBU is too risky: we can do so in our tests but would never run a RAID controller in this manner for real-life applications.

The list of supported operating systems is extensive and covers almost every existing OS save for the most exotic ones. There are also drivers for VMWare. For most of these OSes there are appropriate versions of Adaptec Storage Manager, the exclusive software tool for managing the controller.

They were installed into the standard boxes of the SC system case and fastened with four screws at the bottom. The controller was tested with four and eight HDDs in the following modes:. As we try to cover as many array types as possible, we will publish the results of degraded arrays. A degraded array is a redundant array in which one or more disks depending on the array type have failed but the array still stores data and performs its duties.

We want to note that this combination of the HDD and controller has one problem: its speed of writing in FC-Test is very low. By default, the controller suggests a stripe size of kilobytes for arrays, but we set it always at 64KB. This will help us compare the controller with other models most competitor products use a stripe size of 64KB and, moreover, this is the data block size every version of Windows, up to Windows Vista SP1, uses to process files. If the sizes of the data block and stripe coincide, we can expect a certain performance growth thanks to reduced latencies.

By the way, choosing the stripe size for your RAID array is not an obvious matter. If the stripe is too small, the number of operations the array has to do increases, which may affect its performance.

On the other hand, if the array is mostly used for an application a database, for example that works with data blocks of a specific size, it may be reasonable to set the stripe size at the same value. This question used to be debated hotly in the past. By now, applications have generally learned to access data in blocks of different sizes and the speed of arrays has grown up, yet this factor should still be taken into account when you are building your array. The BIOS was version 5.

In the Database pattern the disk array is processing a stream of requests to read and write 8KB random-address data blocks. We will be discussing graphs and diagrams but you can view the data in tabled format using the following links:. Everything is normal at a queue depth of 1.

The arrays show good scalability. The checksum-based arrays are very good at a queue depth of 1, too. The 4-disk RAID5 proves to be faster than the single disk at writing. The 8-disk arrays are far ahead. The RAID6 slows down but a little when one of its disks fails but the failure of two disks leads to a performance hit. Having to constantly restore data from two checksums writing to a rotated parity array involves reading operations , the controller gets much slower: the degraded array falls behind the single disk.

At high percentages of reads, they are close to the RAID0 arrays consisting of the same number of disks. The RAID10 are not faster than the RAID0 at reading, which means that the controller can read from both disks in a mirror but has no read optimization it does not give the read request to what disk in the mirror can perform it faster.

The degraded RAID10 does not show up its degradedness at high percentages of writes, which is good, but loses its ground at high percentages of reads. Its performance does not slump to the level of the 4-disk arrays, meaning that the controller is reading from both disks in the non-defective mirrors. The 8-disk array survives the loss of one disk more or less acceptably but the loss of a second disk affects its performance greatly: the degraded RAID6 without two disks is ahead of the single HDD at reading but cannot compete with the latter at writing.

When the queue depth grows even longer, we have to take back the supposition we have expressed above: the controller can actually find the faster disk in a mirror. The degraded RAID10 is a disappointment. It copes with writing well but fails at reading. As a result, it is just slightly better than the 4-disk RAID0 through most loads.

It is interesting to compare these numbers to those of the 3ware SA controller that has a processor with completely different architecture. The two products are overall equals: the Adaptec is somewhat more effective at writing whereas the 3ware is somewhat faster at high percentages of reads. There are no serious changes in the standings of this group except that the RAID5 arrays are now somewhat better at reading, especially the degraded array. The degraded RAID6 behave in the same way: the array slows down without one disk and slumps below the level of the single HDD when two of its disks fail.

IOMeter is sending a stream of requests to read and write byte data blocks with a request queue depth of 1 for 10 minutes. Every array is inferior to the single HDD in terms of read response time. The 8-disk arrays are not much worse that the latter, though.

It is the 4-disk arrays save for the RAID10 that are slower by about 1 millisecond, which is a considerable gap. As usual, RAID10 are the best by choosing the faster disk in a mirror. The degraded RAID10 feels good while the degraded arrays with rotated parity are not.

They take last places due to the necessity of recovering data from checksums. Of course, the degraded RAID6 without two disks is the worst array here because it has to recover data from two checksums. It is easy to explain this diagram: the write response time is determined by the total cache of the controller and disks. Among the checksum based arrays the 8-disk ones are ahead, too. The overhead associated with the need to read the checksum data and process them is very small.

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