The risk is using the molex conector present on some disks, not all sata drives has such molex conector on the disk.Īlso, a disk powered by sata power connector that is powered with a molex to sata power adaptor can die if such molex conection is not firm or if you disconnect the molex part. since the disk is been powered by its sata power connector. If the power conector on the disk that is been used is the sata power conector, then it does not matter where power comes, you can use molex to sata power adaptors. In other words, if you use from power suply a molex power conector with a molex to sata power adaptor, the disk itself is powered by its sata power connector, so it may be hot swapable, but if such molex power is atached to the molex power conector on the disk (also using a sata power to molex power adaptor) the disk can not be hot swap without risk (electrical peaks on conect and disconect).įor some disks that they have a molex power conector on them, do not power them through such conector, molex conector is not safe for hot-swap when talking about molex power makes disk not hot swapable, it is about powering the disk by using the molex conector that is on the disk itself. This only applies for newly written data. This is when you should use the "Safely remove" or "Unmount" features. Some OS might delay sending data to the drive, or saving file system information to the drive. Can't guarantee that it will park it's head automatically on power down, because we can't guarantee it has enough power to do it. There are commands to force the drive to park it's heads, but it will also do that when there's no activity on the drive. Is there any AT command to unplug the drive that must be issued or does it park it's head on power down automatically? Remember, as long as there are no activities on the drive, then it's pretty safe to unplug it. Worst case scenario, the OS crash, but your drive will be OK. If the OS doesn't support hot-plug, then it means the OS might need to restart to detect the drive, and that it won't send commands to the drives for a more graceful shutdown. Nah, the drives doesn't care about the OS. That said, if there's no activities happening on the drive, hot-plugging is pretty safe. SSD are not as reliable regarding unexpected power lost. HDD are really reliable with handling unexpected power lost. Unless the drive dies, there's not much risk of data loss. How much risk of data loss will i be facing for this convenience? Does that mean i'm safe and the doc refers to drivers that supports both sata and molex? and the SATA plug does not have any logic it seems. from what i could trace, some molex and Sata power comes from the same 12V rail. Some of my drivers are connected from molex->sata power, just because i'm out of sata power ports on my PSU. In order to take advantage of hot-plug capabilities for your SerialĪTA hard drive, you must use the Serial ATA power connection, not the Hot-plug controllers to actively limit inrush current during driveīut, the above starts another doubt. Pre-charging resistors to passively limit inrush current during drive With power downed receptacles (typical of server applications) Hot-plug solution, which typically includes: Device detection even Hot-pluggable and provide the necessary building blocks for a robust SATA-compliant devices thus need no further modification to be from Western Digital: it says every driver that supports SATA by definition of the standard, already support hot-plugging. Do i need support on the OS? and is there any AT command to unplug the drive that must be issued or does it park it's head on power down automatically? there is a slightly informed discussion on the software side hereįound some more info regarding hot-pluggable. Then, hardware aside, there is the software issue. The drivers I've never seen mentioning hot-pluggable on the specs, even on the enterprise ones. So, I do have support in my bios, motherboard and enclosure. I can't find a single reliable source that tells me how reliable/unreliable is hotswapping on the consumer world. I would love the convenience of inserting and removing HDD/SSD there without shutting down the computer every time.īut while researching about SATA hotswap, out of expensive enterprise solutions, there is zero reliable information. I have a sliding enclosure for HDD and SSD (nothing more than a pass-trhu to power and a sata port) that allow me to cut power to the drive before physically moving it. I have a BIOS that has an option to enable hot-plug on individual ports.
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