diff --git a/include/SAMdisk.h b/include/SAMdisk.h
index 6159cc0..43afe68 100644
--- a/include/SAMdisk.h
+++ b/include/SAMdisk.h
@@ -271,7 +271,7 @@ typedef struct
 	int base = -1, size = -1, gap3 = -1, interleave = -1, skew = -1, fill = -1;
 	int gaps = -1, gap2 = -1, gap4b = -1, idcrc = -1, gapmask = -1, maxsplice = -1;
 	int cylsfirst = -1, head0 = -1, head1 = -1, steprate = -1, check8k = -1;
-	int offsets = -1, fix = -1, mt = -1, plladjust = -1;
+	int offsets = -1, fix = -1, mt = -1, plladjust = -1, hardsectors = -1;
 
 	int command = 0, hex = 0, debug = 0, verbose = 0, log = 0, force = 0, quick = 0;
 	int merge = 0, repair = 0, trim = 0, calibrate = 0, newdrive = 0, byteswap = 0;
diff --git a/src/KryoFlux.cpp b/src/KryoFlux.cpp
index 5d6a22f..da084a4 100644
--- a/src/KryoFlux.cpp
+++ b/src/KryoFlux.cpp
@@ -217,6 +217,7 @@ void KryoFlux::ReadFlux (int revs, FluxData &flux_revs, std::vector<std::string>
 	uint32_t time = 0, stream_pos = 0;
 	uint32_t ps_per_tick = PS_PER_TICK(SAMPLE_FREQ);
 	std::vector<uint32_t> index_offsets;
+	int hard_indexes = 0;
 
 	auto itBegin = data.begin(), it = itBegin, itEnd = data.end();
 	while (it != itEnd)
@@ -272,8 +273,13 @@ void KryoFlux::ReadFlux (int revs, FluxData &flux_revs, std::vector<std::string>
 					{
 						assert(size == 12);
 
-						auto pdw = reinterpret_cast<const uint32_t *>(&*it);
-						index_offsets.push_back(util::letoh(pdw[0]));
+						// Soft-sectored disks have a single start-of-track index.
+						// Hard-sectors are combined to achieve the same result.
+						if (opt.hardsectors <= 1 || !(++hard_indexes % opt.hardsectors))
+						{
+							auto pdw = reinterpret_cast<const uint32_t *>(&*it);
+							index_offsets.push_back(util::letoh(pdw[0]));
+						}
 						break;
 					}
 
diff --git a/src/SAMdisk.cpp b/src/SAMdisk.cpp
index fe48b6a..3f4f359 100644
--- a/src/SAMdisk.cpp
+++ b/src/SAMdisk.cpp
@@ -145,6 +145,7 @@ struct option long_options[] =
 	{ "cyls",		required_argument, nullptr, 'c' },
 	{ "head",		required_argument, nullptr, 'h' },
 	{ "sectors",	required_argument, nullptr, 's' },
+	{ "hard-sectors",required_argument,nullptr, 'H' },
 	{ "retries",	required_argument, nullptr, 'r' },
 	{ "rescans",	optional_argument, nullptr, 'R' },
 	{ "double-step",	  no_argument, nullptr, 'd' },
@@ -245,7 +246,7 @@ struct option long_options[] =
 	{ 0, 0, 0, 0 }
 };
 
-static char short_options[] = "?nmdvfLxb:c:h:s:r:R:g:i:k:z:0:1:D:";
+static char short_options[] = "?nmdvfLxb:c:h:s:H:r:R:g:i:k:z:0:1:D:";
 
 bool BadValue (const char *pcszName_)
 {
@@ -285,6 +286,12 @@ bool ParseCommandLine (int argc_, char *argv_[])
 				opt.sectors = util::str_value<long>(optarg);
 				break;
 
+			case 'H':
+				opt.hardsectors = util::str_value<int>(optarg);
+				if (opt.hardsectors <= 1)
+					throw util::exception("invalid hard-sector count '", optarg, "'");
+				break;
+
 			case 'r':
 				opt.retries = util::str_value<int>(optarg);
 				break;