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My guess is that the ones that are not working have come out of a Hitachi VSP system. The one that is working was sold as a JBOD. The ones from the VSP won't spin up the drives. I have not checked whether there are any error LEDs on the drives. Will take a look tomorrow. I think the difference...

The TL;DR is they are NOT write-protected. The more complicated answer is that the four DKR2H-H10RSS drives came from a Hitachi VSP storage system and have special firmware that only accepts SCSI_WRITE_AND_VERIFY commands. You can confirm this by using the sg_write_and_verify command to write...

NVIDIA P4 or T4, depending on your budget. It's not AMD, but it will work inside the server.

Unless you are processing a lot of data on the system, the limit is the network card. So unless you are plugging in a 100Gbps network card, it all becomes immaterial if the SAS card is limiting the speed. At work, I back up the petabyte scale file system for the HPC onto a server with a bunch of...

I have never seen a drive have its ready light on but not show up in the OS. That would require either a dead backplane or a SAS cable not plugged in, I would have thought. In the latter case, the whole shelf would be missing (why are you not using multipath???) and would be obvious from the...

Personally, I like to go with a board that takes an internal power connection. I then mount a decent (Mean Well, TDK, XP Power, or similar) open-frame 2"x4" PSU in a gutted PSU case that is suitable for my case. Cut a bit of FR4 to size, drill a few holes, and mount some M3 stand-offs. You can...

You can always use sdparm to toggle the drive's ready light meaning. Either on or off, depending on what you have it by default. Usually it's on, meaning the drive has the presence LED on and blinks with activity, so sdparm --set=RLM /dev/XXXX Will turn it off, and the drive becomes readily...

When flashing firmware or doing any other operation on a computer remotely, especially if it is long-running, which could cause issues if network connectivity is lost, run it in a screen or tmux session. Then, if you do lose connectivity, the operation will continue, and you can recover the...

Maybe, but the actual RAID controllers are garbage compared to the Engenio arrays. HDD firmware updates require no I/O activity, you can't change RAID levels on existing arrays or add extra disk to them and thats just starters.

It is covered in page two of this topic. sg_write_buffer -b 4k -m dmc_offs_save -I MD12_106.bin /dev/sgXX where sgXX is the device name recovered from lsscsi -g You need to repeat for both ESM's even if only one is connected to the server (assuming you have two) and then hard power cycle the...

Hum, just got access to several hundred of these drives, and unlike the 4TB drives from a previous system, I have not needed to flash the firmware to get around the SCSI WRITE AND VERIFY issue on VSP drives. All I have needed to do is reformat them down to a standard sector size. However, at...

Ok, a weird one. After much hassle in getting a working serial port on a Windows machine, which ultimately involved me dragging the MD3200 out of the data centre to access a Windows machine with a serial port. I have flashed it to be an MD1200 via the serial port using TeraTerm, and everything...

Most of the firmware for a hard drive is stored on the spinning platters. It harks back to a time when flash memory was significantly more expensive than it is today. Basically, the flash holds just enough to spin the drive up and load the rest from the platters. You can see this sometimes when...

This is not true. The MS1200/MD1220 are most emphatically NOT designed and built by Dell. They are rebranded Engenio devices, originally from LSI, but the line was sold to NetApp in 2011. This holds for the entire PowerVault MD storage line from Dell. The fact that you can turn an MD3200 into...

IEEE 802.1aq (aka Shortest Path Bridging) offers the same in Ethernet. In my opinion, vendors have not pushed for either SPB or TRILL because that would simplify network configuration, and they can't have that. Who needs vendor certification if all you have to do is plug in links where you want...

Question if OCP was disabled in the BIOS how on earth did you have a network connection to the server in the first place? I don't think you can configure them without an OCP card from the factory as they don't have any onboard without an OCP card.

Cheap finest Chineasium PSU's can and *DO* burn down people's houses on a *regular* basis. In the UK, the London Fire Brigade attend multiple house fires a month, started by dodgy PSU's and chargers. While the actual chance is low, it is at least 10 orders of magnitude more likely than an...

Because for the most part fibre and DAC cables are not consumer parts and with no useful standard for 25Gbps over twisted pair it severely limits the likelihood of even SFP28 switches for the SOHO market. You are not going to see consumer level 25Gbps internet access for consumers for a...

Without a useful standard for 25Gbps over twisted pair yes it is. Right now the only standard for 25Gbps over twisted pair requires Cat8 cable with CG45 connectors and is limited to 30m direct connection so no patch panels, or outlets in the mix. It is intended for data centre usage a bit like...

As far as I can make out when you plug in a QSFP to SFP adaptor into a NIC or switch they have zero idea that it exists. No tool that I have tried shows anything. It's not till you put the SFP module in that the NIC or switch shows anything for that port. Having dismantled a QSFP+ to SFP+...