#TRIM ENABLER SSD DRIVER#
#TRIM ENABLER SSD DOWNLOAD#

Once it DISCARDs the blocks, simply put the drive back in RAID mode, mount the filesystem, and then restart your applications.

The trick is to stop using the RAID drive through the RAID driver, expose the SSD as a JBOD, re-mount the filesystem, and then TRIM it there. This requires taking down the application that uses your RAID drive, but at least it does not require you to walk to a DataCenter to pull some hardware out of a system. If you want to TRIM your SSDs, you would have to shutdown System_B, pull the drive out, connect it to a SAS/SATA-capable system, and fstrim there.įortunately for us, there's a small trick to temporarily expose the native capabilities of your device and TRIM it. Here's an HPE D元60Gen10 with a high-end SmartArray RAID card: ~]# lsblk -dDĪll LSI-based ( megaraid_sas driver) and SmartArray-based (hpsa driver) systems suffer from this problem. HPQ SmartArray systems are affected in a similar way. This is the reason why fstrim on System_B did not do or return anything. All of the values are zero. The SSD in a RAID 0 behind a PERC H730P on System_B does not expose any DISCARD capabilities. NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO Using lsblk, we'll expose the DISCARD capabilities of those two devices: ~]# lsblk -dD Yes, it's the same drive (Samsung EVO 860) and the same firmware (3B6Q). ID | Type | Drive Model | Size | Status | Speed | Temp | Slot ID | LSI IDĬ0u0p0 | SSD | S3YUNB0KC09340D Samsung SSD 860 EVO 2TB RVT03B6Q | 1.818 TB | Online, Spun Up | 6.0Gb/s | 23C | | 0 ID | Type | Size | Strpsz | Flags | DskCache | Status | OS Path | CacheCade |InProgressĬ0u0 | RAID-0 | 1818G | 512 KB | ADRA,WB | Enabled | Optimal | /dev/sda | None |None ID | H/W Model | RAM | Temp | BBU | FirmwareĬ0 | PERC H730P Adapter | 2048MB | 60C | Good | FW: 25. How do I know it's the same drive? Thanks to the use of megaclisas-status, the RAID HBA can be queried. Here's an identical drive (same model, same firmware) behind a RAID controller (a PERC H730P) on a different system (let's call that system System_B in the rest of this document): ~]# lsscsi Here's an SSD (a Samsung EVO 860 2Tb drive) attached to a SATA connector on a RHEL system (we will name that system System_A in the rest of this document): ~]# lsscsi

#TRIM ENABLER SSD DRIVER#

At the end of the SCSI I/O chain, the capabilities of a device boil down to the device itself, and the RAID driver your drive is attached to. If your SSDs are behind a RAID volume attached to a RAID controller (HPE's SmartArray, Dell's PERC, or anything based on LSI/Avago's MegaRAID), here's what happens: ~]# fstrim ~]# Here's an example using a Red Hat Enterprise Linux (RHEL) system: ~]# fstrim -av On most systems, getting the performance back is usually a simple matter of issuing a filesystem trim ( fstrim) command. Or maybe you once filled your SSD to 100%, and now you cannot get the original performance/IOPS back. Perhaps you have TLC (3bits per cell) or QLC (4bits per cell) drives instead of the usually more expensive enterprise-class SLC or MLC drives (the latter are less susceptible to a performance drop since they put aside more extra blocks to help with overwrites when the drive is at capacity). There are, however, some cases in which you may need to have the filesystem inform the drive of the blocks which it discarded.

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#TRIM ENABLER SSD DOWNLOAD#

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Trim enabler ssd