Do I need certified readers?

Can I mix readers certified and not certified in my PERC 5 / I array?

What's the story with the certified readers?

Thank you

You can, but I wouldn't.

Here are some things you need to know about the readers:

1 consumer/desktop/computer portable readers. These discs are designed for operation 8 x 5 and are programmed with settings in order to optimize their as the only drive in a machine, with lax timings and thresholds of long recovery. These discs are generally unsuitable for use in RAID storage or business devices.

You will experience almost certainly some problems with consumer drives... nothing random timeouts/connection offline similarly not be seen by the controller at all.

2 business readers. These discs are designed for operation 24 x 7 and are programmed with settings in order to optimize their when used in conjunction with other disks in an array. Timing and the error thresholds and the recovery are very small and very strict, on the assumption that they would use in a high-performance configuration, redundant. Business records are also scheduled to meet a series of commands "enterprise" drives to consumers are not. Business controllers expect readers to answer correctly and on time to these requests - consumer readers don't know how to meet these demands of business readers do.

You can or can without any problem with the readers of the company's sales in the retail/credits - depends on their narrowness and settings they are at the height of what awaits the controller. Generic/detail of the models typically have relaxed a little more settings that certified readers, allowing them to be more generally compatible with several devices, but also may lead to questions to communicate effectively with the controller. Some drive manufacturers tweak and test their firmware to be compatible with the different controllers. Take the WD RE4, for example: they have lists of compatibility indicating what controllers they have tested and verified compatibility with. These are not considered "certified", that specific OEM approved no new firmware, but there is a very high probability that they will work without problem.

3 certified disks. These drives are enterprise class disks, but are loaded with a special version of the firmware, tuned to the specific needs and parameters of the controller for which they are certified. Orders of the controller and the settings expect concrete answers or wait for answers in a particular time frame, certified firmware ensures that regardless of the brand or model of the player, this player is guaranteed to answer how and when the controller expects. Certified firmware is loaded on the disks by drive for the OEM manufacturers. This isn't a practice Dell - HP, IBM, and most of the names of big 'storage'... is the only way to ensure the reliability and performance of their systems.

All that said, as a recommendation or suggestion only, you can use 'good' company not certified discs, class OR certified readers but I would not mix them if it can be helped.

Tags: Dell Servers

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The controller is a latest firmware and the BIOS and other components. Used Dell Repository Manager iDRAC discovery and the ISO bootable to update everything.

SAMSUNG SSD are on a latest firmware as well.

Hello.

The Samsung 850 Pro SSD are not validated or certified to work with controllers from Dell, and as such, there is an incompatibility of communication between readers and the controller at the firmware level. Thus, you are required to achieve the unexpected poor read and write performance regardless of the controller cache settings. Consider using Dell certified readers.

Thank you.

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THX Flash, that I'll go and find some certified readers

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[1] physical path of disk redundancy: OK
```
      Physical Disk type:             Serial Attached SCSI (SAS)  

      Speed:                          7,200 RPM                         Current data rate:              3 Gbps                            Product ID:                     ST31000640SS                      Firmware version:               MS04                              Serial number:                  9QJ2SDBK                          Vendor:                         SEAGATE                           Date of manufacture:            16 December 2008
```
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Hello director87

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Thank you

Although it is the dell DELL SAS business class model, can I buy a 600 GB 15.7 k sas 3.5 Cheetah? I could put any 15.7 k sas model in a dell and it is not compatible.

can I buy a 600 GB 15.7 k sas 3.5 Cheetah without having the business class dell model? I could put any 15.7 k sas model in a dell and it is not compatible.

any help would be greatly appreciated as im new too servers.

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