See everything and the kitchen sink about your harddrive
Ever wondered what specifications your harddisk/SSD actually has? hdparm is your best friend here. I wondered whether my Corsair SSD actually had TRIM supported/enabled, and this is what
sudo hdparm -I /dev/sda (of course, replace
/dev/sda with w/e your desired device node is) got me:
/dev/sda: ATA device, with non-removable media Model Number: Corsair CMFSSD-128D1 Serial Number: 1044318XXXXXXdeleted Firmware Revision: 2.0 Standards: Supported: 8 7 6 5 Likely used: 8 Configuration: Logical max current cylinders 16383 16383 heads 16 16 sectors/track 63 63 -- CHS current addressable sectors: 16514064 LBA user addressable sectors: 250069680 LBA48 user addressable sectors: 250069680 Logical Sector size: 512 bytes Physical Sector size: 512 bytes device size with M = 1024*1024: 122104 MBytes device size with M = 1000*1000: 128035 MBytes (128 GB) cache/buffer size = unknown Nominal Media Rotation Rate: Solid State Device Capabilities: LBA, IORDY(can be disabled) Queue depth: 32 Standby timer values: spec'd by Standard, no device specific minimum R/W multiple sector transfer: Max = 1 Current = 1 DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=120ns IORDY flow control=120ns Commands/features: Enabled Supported: * SMART feature set Security Mode feature set * Power Management feature set * Write cache * Look-ahead * Host Protected Area feature set * WRITE_BUFFER command * READ_BUFFER command * DOWNLOAD_MICROCODE SET_MAX security extension * 48-bit Address feature set * Device Configuration Overlay feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART self-test * General Purpose Logging feature set * Gen1 signaling speed (1.5Gb/s) * Gen2 signaling speed (3.0Gb/s) * Native Command Queueing (NCQ) * Phy event counters * DMA Setup Auto-Activate optimization Device-initiated interface power management * Software settings preservation * Data Set Management TRIM supported (limit unknown) * Deterministic read data after TRIM Security: supported not enabled not locked not frozen not expired: security count not supported: enhanced erase Checksum: correct
Seriously? Awesome. Never knew about this, good to know. Might come in handy again.