Hello List, I am experiencing slow write speeds with a new server using an SSD drive. I'm running the latest current 6.99.49 (amd64) and I'm getting only about 8 MB/s write speed. I'm expecting > 300 MB/s of write speed.
The relevant parts of the dmesg: pci0 at mainbus0 bus 0: configuration mode 1 pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok ahcisata0 at pci0 dev 17 function 0: vendor 0x1022 product 0x7801 (rev. 0x40) ahcisata0: interrupting at ioapic0 pin 19 ahcisata0: 64-bit DMA ahcisata0: AHCI revision 1.30, 1 port, 32 slots, CAP 0xf733ff00<PSC,SSC,PMD,FBSS,SPM,ISS=0x3=Gen3,SCLO,SAL,SALP,SMPS,SSNTF,SNCQ,S64A> atabus0 at ahcisata0 channel 0 ahcisata0 port 0: device present, speed: 6.0Gb/s wd0 at atabus0 drive 0 wd0: <SanDisk SSD i110 32GB> wd0: drive supports 1-sector PIO transfers, LBA48 addressing wd0: 30533 MB, 62037 cyl, 16 head, 63 sec, 512 bytes/sect x 62533296 sectors wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) wd0(ahcisata0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133) (using DMA) Any ideas ? Cheers, Zafer
