On Tue, 30 Dec 2014, Douglas Gilbert wrote: > IMO about the best SATL is in the MPT SAS-2 and SAS-3 HBAs and > here is that page for a SAS expander attached SATA disk: > # sg_vpd -p bl /dev/sg3 OP here. FWIW, this is what I get when running that command on the SCSI generic device that corresponds to the USB-3 (non-UAS) disk[1] that had the issue: ---- $ sudo sg_vpd -p bl /dev/sg4 Block limits VPD page (SBC): Write same no zero (WSNZ): 0 Maximum compare and write length: 0 blocks Optimal transfer length granularity: 1 blocks Maximum transfer length: 8191 blocks Optimal transfer length: 8191 blocks Maximum prefetch length: 8191 blocks Maximum unmap LBA count: 0 Maximum unmap block descriptor count: 0 Optimal unmap granularity: 0 Unmap granularity alignment valid: 0 Unmap granularity alignment: 0 Maximum write same length: 0x0 blocks $ ---- If more info is needed, just let me know. -Kenny [1] - SCSI generic devices follow "/proc/scsi/scsi" order, right? -- Kenneth R. Crudup Sr. SW Engineer, Scott County Consulting, Silicon Valley -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
