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Remove the SMART attribute 193 from the failure probability computation
This commit is contained in:
Andrea Mazzoleni
parent
93804c20c3
commit
649b3f1f0b
8 changed files with 18 additions and 99 deletions
3
HISTORY
3
HISTORY
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@ -3,6 +3,9 @@ SnapRAID HISTORY
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13.0 2025/XX
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============
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* Remove the SMART attribute 193 "Load Cycle Count" from the failure
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probability computation, as its effectiveness in predicting failures
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is too dependent on the hard disk vendor.
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* Add a new -A, --stats option for an extensive view of the process.
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* Add new thermal protection configuration options:
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- temp_limit TEMPERATURE_CELSIUS
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@ -241,70 +241,6 @@ static double SMART_188_R[SMART_MEASURES] = {
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1.3731,
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};
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/*
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* Divider for SMART attribute 193
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*/
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static unsigned SMART_193_STEP = 649;
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/*
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* Failure rate for 30 days, for a disk
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* with SMART attribute 193 at a given value.
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*/
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static double SMART_193_R[SMART_MEASURES] = {
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0.0000, 0.0016, 0.0032, 0.0036, 0.0039,
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0.0042, 0.0046, 0.0049, 0.0052, 0.0054,
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0.0057, 0.0060, 0.0062, 0.0065, 0.0068,
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0.0071, 0.0074, 0.0077, 0.0080, 0.0083,
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0.0086, 0.0091, 0.0094, 0.0098, 0.0101,
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0.0104, 0.0108, 0.0111, 0.0119, 0.0122,
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0.0127, 0.0130, 0.0134, 0.0137, 0.0141,
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0.0144, 0.0146, 0.0152, 0.0155, 0.0159,
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0.0163, 0.0165, 0.0168, 0.0172, 0.0176,
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0.0179, 0.0184, 0.0188, 0.0190, 0.0194,
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0.0197, 0.0201, 0.0204, 0.0207, 0.0209,
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0.0213, 0.0215, 0.0219, 0.0221, 0.0225,
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0.0229, 0.0234, 0.0241, 0.0246, 0.0253,
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0.0263, 0.0278, 0.0286, 0.0293, 0.0298,
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0.0302, 0.0306, 0.0311, 0.0315, 0.0319,
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0.0322, 0.0329, 0.0334, 0.0338, 0.0343,
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0.0348, 0.0352, 0.0358, 0.0362, 0.0367,
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0.0371, 0.0374, 0.0378, 0.0383, 0.0388,
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0.0393, 0.0397, 0.0401, 0.0404, 0.0410,
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0.0416, 0.0422, 0.0428, 0.0436, 0.0443,
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0.0449, 0.0454, 0.0457, 0.0462, 0.0468,
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0.0473, 0.0479, 0.0483, 0.0488, 0.0491,
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0.0493, 0.0497, 0.0500, 0.0504, 0.0507,
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0.0510, 0.0514, 0.0519, 0.0523, 0.0528,
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0.0533, 0.0538, 0.0542, 0.0547, 0.0551,
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0.0556, 0.0560, 0.0565, 0.0572, 0.0577,
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0.0584, 0.0590, 0.0594, 0.0599, 0.0603,
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0.0607, 0.0611, 0.0616, 0.0621, 0.0626,
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0.0632, 0.0639, 0.0647, 0.0655, 0.0661,
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0.0669, 0.0676, 0.0683, 0.0691, 0.0699,
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0.0708, 0.0713, 0.0719, 0.0724, 0.0730,
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0.0736, 0.0745, 0.0751, 0.0759, 0.0769,
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0.0779, 0.0787, 0.0796, 0.0804, 0.0815,
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0.0825, 0.0833, 0.0840, 0.0847, 0.0854,
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0.0859, 0.0865, 0.0873, 0.0881, 0.0890,
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0.0900, 0.0912, 0.0919, 0.0929, 0.0942,
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0.0956, 0.0965, 0.0976, 0.0986, 0.0995,
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0.1006, 0.1019, 0.1031, 0.1038, 0.1045,
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0.1051, 0.1058, 0.1066, 0.1072, 0.1077,
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0.1084, 0.1091, 0.1099, 0.1104, 0.1111,
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0.1118, 0.1127, 0.1135, 0.1142, 0.1149,
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0.1157, 0.1163, 0.1168, 0.1173, 0.1179,
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0.1184, 0.1189, 0.1195, 0.1203, 0.1208,
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0.1213, 0.1223, 0.1231, 0.1240, 0.1246,
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0.1252, 0.1260, 0.1269, 0.1276, 0.1287,
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0.1303, 0.1311, 0.1319, 0.1328, 0.1335,
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0.1341, 0.1348, 0.1362, 0.1373, 0.1380,
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0.1387, 0.1392, 0.1398, 0.1403, 0.1408,
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0.1412, 0.1418, 0.1422, 0.1428, 0.1434,
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0.1439, 0.1445, 0.1451, 0.1457, 0.1464,
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0.1469, 0.1475, 0.1480, 0.1486, 0.1491,
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0.1498,
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};
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/*
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* Divider for SMART attribute 197
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*/
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@ -501,12 +437,6 @@ static double smart_afr(uint64_t* smart, const char* model)
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afr = r;
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}
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if (smart[193] != SMART_UNASSIGNED) {
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double r = smart_afr_value(SMART_193_R, SMART_193_STEP, smart[193] & mask32);
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if (afr < r)
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afr = r;
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}
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if (smart[197] != SMART_UNASSIGNED) {
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double r = smart_afr_value(SMART_197_R, SMART_197_STEP, smart[197] & mask32);
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if (afr < r)
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@ -922,10 +852,7 @@ static int devtest(tommy_list* low, int operation)
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case 0 : entry->smart[j] = 0; break;
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case 1 : entry->smart[j] = SMART_UNASSIGNED; break;
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default :
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if (j == 193)
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entry->smart[j] = c - 2;
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else
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entry->smart[j] = 0;
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entry->smart[j] = 0;
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break;
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}
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}
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@ -445,7 +445,6 @@ int randomize(void* ptr, size_t size);
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#define SMART_REALLOCATED_SECTOR_COUNT 5
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#define SMART_POWER_ON_HOURS 9
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#define SMART_AIRFLOW_TEMPERATURE_CELSIUS 190
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#define SMART_LOAD_CYCLE_COUNT 193
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#define SMART_TEMPERATURE_CELSIUS 194
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/**
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@ -1563,7 +1563,6 @@ int smartctl_attribute(FILE* f, const char* file, const char* name, uint64_t* sm
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} else if (sscanf(s, "Current Drive Temperature: %" SCNu64, &smart[SMART_TEMPERATURE_CELSIUS]) == 1) {
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} else if (sscanf(s, "Drive Trip Temperature: %" SCNu64, &smart[SMART_AIRFLOW_TEMPERATURE_CELSIUS]) == 1) {
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} else if (sscanf(s, "Accumulated start-stop cycles: %" SCNu64, &smart[SMART_START_STOP_COUNT]) == 1) {
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} else if (sscanf(s, "Accumulated load-unload cycles: %" SCNu64, &smart[SMART_LOAD_CYCLE_COUNT]) == 1) {
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} else if (sscanf(s, " number of hours powered up = %" SCNu64, &smart[SMART_POWER_ON_HOURS]) == 1) {
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/* ATA */
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} else if (sscanf(s, "Serial Number: %63s", serial) == 1) {
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15
snapraid.1
15
snapraid.1
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@ -1572,10 +1572,11 @@ DISK is the same disk name specified in the \[dq]disk\[dq] option.
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PARITY is one of the parity name as \[dq]parity,(1,2,3,4,5,6,z)\-parity\[dq].
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The special value * can be used to ignore the attribute on all disks.
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.PP
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For example, to ignore the \[dq]Load_Cycle_Count\[dq] attribute on all disks:
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For example, to ignore the \[dq]Current Pending Sector Count\[dq] attribute on
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all disks:
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.PP
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.RS 4
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smartignore * 193
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smartignore * 197
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.PD 0
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.PD
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.RE
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@ -1583,7 +1584,7 @@ smartignore * 193
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To ignore it only on the first parity disk:
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.PP
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.RS 4
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smartignore parity 193
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smartignore parity 197
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.PD 0
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.PD
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.RE
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@ -1637,10 +1638,6 @@ smartctl parity \-d areca,1/1 /dev/sg0
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.PD
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smartctl 2\-parity \-d areca,2/1 /dev/sg0
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.PD 0
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.PP
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.PD
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smartignore * 193
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.PD 0
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.PD
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.RE
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.PP
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@ -1697,10 +1694,6 @@ smartctl parity \-d areca,1/1 /dev/arcmsr0
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.PD
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smartctl 2\-parity \-d areca,2/1 /dev/arcmsr0
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.PD 0
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.PP
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.PD
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smartignore * 193
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.PD 0
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.PD
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.RE
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.SH PATTERN
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@ -1274,13 +1274,14 @@ Configuration
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PARITY is one of the parity name as "parity,(1,2,3,4,5,6,z)-parity".
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The special value * can be used to ignore the attribute on all disks.
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For example, to ignore the "Load_Cycle_Count" attribute on all disks:
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For example, to ignore the "Current Pending Sector Count" attribute on
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all disks:
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:smartignore * 193
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:smartignore * 197
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To ignore it only on the first parity disk:
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:smartignore parity 193
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:smartignore parity 197
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Examples
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An example of a typical configuration for Unix is:
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@ -1297,7 +1298,6 @@ Configuration
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:smartctl d2 -d usbjmicron %s
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:smartctl parity -d areca,1/1 /dev/sg0
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:smartctl 2-parity -d areca,2/1 /dev/sg0
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:smartignore * 193
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An example of a typical configuration for Windows is:
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@ -1314,7 +1314,6 @@ Configuration
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:smartctl d2 -d usbjmicron %s
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:smartctl parity -d areca,1/1 /dev/arcmsr0
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:smartctl 2-parity -d areca,2/1 /dev/arcmsr0
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:smartignore * 193
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Pattern
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Patterns are used to select a subset of files to exclude or include in
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@ -1368,13 +1368,14 @@ DISK is the same disk name specified in the "disk" option.
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PARITY is one of the parity name as "parity,(1,2,3,4,5,6,z)-parity".
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The special value * can be used to ignore the attribute on all disks.
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For example, to ignore the "Load_Cycle_Count" attribute on all disks:
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For example, to ignore the "Current Pending Sector Count" attribute on
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all disks:
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smartignore * 193
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smartignore * 197
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To ignore it only on the first parity disk:
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smartignore parity 193
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smartignore parity 197
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7.17 Examples
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-------------
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@ -1393,7 +1394,6 @@ An example of a typical configuration for Unix is:
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smartctl d2 -d usbjmicron %s
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smartctl parity -d areca,1/1 /dev/sg0
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smartctl 2-parity -d areca,2/1 /dev/sg0
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smartignore * 193
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An example of a typical configuration for Windows is:
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@ -1410,7 +1410,6 @@ An example of a typical configuration for Windows is:
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smartctl d2 -d usbjmicron %s
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smartctl parity -d areca,1/1 /dev/arcmsr0
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smartctl 2-parity -d areca,2/1 /dev/arcmsr0
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smartignore * 193
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8 PATTERN
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@ -22,5 +22,5 @@ include *.hidden
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exclude *.unrecoverable
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smartctl disk1 %s
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smartctl parity /dev/sda
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smartignore * 193
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smartignore parity 193
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smartignore * 197
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smartignore parity 197
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