--- nono/vm/scsidev.cpp	2026/04/29 17:04:59	1.1.1.11
+++ nono/vm/scsidev.cpp	2026/04/29 17:05:03	1.1.1.12
@@ -619,7 +619,7 @@ SCSIDisk::SCSIDisk(SCSIHostDevice *h, in
 	// lib/object.h 参照。
 	SetName(string_format("SCSI%s%d", devtypename, id));
 	ClearAlias();
-	AddAlias(GetName());
+	AddAlias(string_format("SCSI%d", id));
 	AddAlias(string_format("%s%d", devtypename, id));
 
 	switch (devtype) {
@@ -770,13 +770,11 @@ SCSIDisk::LoadDisk(const std::string& pa
 
 	// 新しいイメージをオープン(する準備)
 	pathname = pathname_;
-	try {
-		image.reset(DiskImage::Create(pathname));
-	} catch (...) {
+	if (image.CreateHandler(pathname) == false) {
 		goto done;
 	}
 
-	if (image->GetInfo(&size, &w_ok) < 0) {
+	if (image.GetInfo(&size, &w_ok) == false) {
 		goto done;
 	}
 
@@ -847,7 +845,7 @@ SCSIDisk::LoadDisk(const std::string& pa
 
 	// ここでオープン
 	read_only = (GetWriteMode() != RW::Writeable);
-	if (image->Open(read_only) == false) {
+	if (image.Open(read_only, write_ignore) == false) {
 		goto done;
 	}
 
@@ -916,7 +914,7 @@ void
 SCSIDisk::Clear()
 {
 	medium_loaded = false;
-	image.reset();
+	image.Close();
 	pathname.clear();
 	write_mode = RW::Writeable;
 }
@@ -1127,7 +1125,7 @@ SCSIDisk::Read(std::vector<uint8>& buf,
 	if (__predict_false((bool)image == false)) {
 		return false;
 	}
-	return image->Read(buf.data(), start, buf.size());
+	return image.Read(buf.data(), start, buf.size());
 }
 
 bool
@@ -1137,15 +1135,11 @@ SCSIDisk::Write(const std::vector<uint8>
 		return false;
 	}
 
-	if (GetWriteMode() == RW::Writeable) {
-		return image->Write(buf.data(), start, buf.size());
-	} else if (GetWriteMode() == RW::WriteIgnore) {
-		// 書き込み無視
-		return true;
-	} else {
+	if (GetWriteMode() >= RW::WriteProtect) {
 		// 書き込み不可
 		return false;
 	}
+	return image.Write(buf.data(), start, buf.size());
 }
 
 off_t
@@ -1154,7 +1148,7 @@ SCSIDisk::GetSize() const
 	if (__predict_false((bool)image == false)) {
 		return 0;
 	}
-	return image->GetSize();
+	return image.GetSize();
 }
 
 // 指定の場所を自由に読み出す
@@ -1165,11 +1159,7 @@ SCSIDisk::Peek(void *buf, uint64 start,
 	if (__predict_false((bool)image == false)) {
 		return false;
 	}
-
-	if (start + len > GetSize()) {
-		return false;
-	}
-	return image->Read(buf, start, len);
+	return image.Read(buf, start, len);
 }
 
 // メディアの取り出し可否(取り出し禁止)を設定する