>From a quick glance in the code atactl calls ATAPI_SMART/ATA_SMART_STATUS, which maps to section 7.31.6 of the ATA-3 spec[0] (there's newer standards, but shouldn't have changed). Here it states: NORMAL OUTPUTS - If the device has not detected a thrshold exceeded condition, the device sets the Cylinder Low register to 4Fh and the Cylinder High register to C2h. If the device has detected a threshold exceeded condition, the device sets the Cylinder Low register to F4h and the Cylinder High register to 2Ch.
The message "No SMART threshold exceeded" only shows when req.cylinder == 0xc24f. So unless I'm missing something it's your disk's SMART that returns something that doesn't make sense. martijn@ [0] https://www.scs.stanford.edu/10wi-cs140/pintos/specs/ata-3-std.pdf On Mon, 2022-05-30 at 15:24 +0200, Jan Stary wrote: > This is current/adm64 on a PC (dmesg below). > I monitor disk status with atactl. > On one of the disks, I get this: > > # atactl sd2 identify > Model: WDC WD3200AAJS-00VWA0, Rev: 12.01B02, Serial #: > WD-WMARW0118535 > Device type: ATA, fixed > Cylinders: 16383, heads: 16, sec/track: 63, total sectors: 625142448 > Device capabilities: > ATA standby timer values > IORDY operation > IORDY disabling > Device supports the following standards: > ATA-1 ATA-2 ATA-3 ATA-4 ATA-5 ATA-6 ATA-7 ATA-8 > Master password revision code 0xfffe > Device supports the following command sets: > NOP command > READ BUFFER command > WRITE BUFFER command > Host Protected Area feature set > Read look-ahead > Write cache > Power Management feature set > Security Mode feature set > SMART feature set > Flush Cache Ext command > Flush Cache command > Device Configuration Overlay feature set > 48bit address feature set > Automatic Acoustic Management feature set > Set Max security extension commands > Set Features subcommand required > Power-up in standby feature set > DOWNLOAD MICROCODE command > SMART self-test > SMART error logging > Device has enabled the following command sets/features: > NOP command > READ BUFFER command > WRITE BUFFER command > Host Protected Area feature set > Read look-ahead > Write cache > Power Management feature set > SMART feature set > Flush Cache Ext command > Flush Cache command > Device Configuration Overlay feature set > 48bit address feature set > Automatic Acoustic Management feature set > Set Features subcommand required > DOWNLOAD MICROCODE command > > # atactl sd2 readattr > Attributes table revision: 16 > ID Attribute name Threshold Value Raw > 1 Raw Read Error Rate 51 199 0x0000000309c6 > 3 Spin Up Time 21 157 0x000000001405 > 4 Start/Stop Count 0 100 0x0000000002b7 > 5 Reallocated Sector Count 140 200 0x000000000000 > 7 Seek Error Rate 51 200 0x000000000000 > 9 Power-On Hours Count 0 76 0x000000004660 > 10 Spin Retry Count 51 100 0x000000000000 > 11 Calibration Retry Count 51 100 0x000000000000 > 12 Device Power Cycle Count 0 100 0x0000000001ec > 192 Power-Off Retract Count 0 200 0x000000000124 > 193 Load Cycle Count 0 200 0x0000000002b7 > 194 Temperature 0 105 0x00000000002a > 196 Reallocation Event Count 0 200 0x000000000000 > 197 Current Pending Sector Count 0 200 0x00000000000a > 198 Off-Line Scan Uncorrectable Sect 0 200 0x000000000003 > 199 Ultra DMA CRC Error Count 0 200 0x00000000001d > 200 *Write Error Rate 51 1 0x00000000b290 > One or more threshold values exceeded! > > # atactl sd2 smartstatus > No SMART threshold exceeded > > Either some threshold was exceeded or it wasn't: > am I missing some subtle semantics here? > > Jan >
