diff --git a/hw/ide/macio.c b/hw/ide/macio.c
index 9e613a9..7ef089f 100644
--- a/hw/ide/macio.c
+++ b/hw/ide/macio.c
@@ -56,11 +56,13 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
     DBDMA_io *io = opaque;
     MACIOIDEState *m = io->opaque;
     IDEState *s = idebus_active_if(&m->bus);
+    int unaligned;
 
     if (ret < 0) {
         m->aiocb = NULL;
         qemu_sglist_destroy(&s->sg);
         ide_atapi_io_error(s, ret);
+        io->remainder_len = 0;
         goto done;
     }
 
@@ -85,7 +87,29 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
         s->io_buffer_index &= 0x7ff;
     }
 
-    if (s->packet_transfer_size <= 0) {
+    s->io_buffer_size = io->len;
+
+    MACIO_DPRINTF("remainder: %d io->len: %d size: %d\n", io->remainder_len,
+                  io->len, s->packet_transfer_size);
+    if (io->remainder_len && io->len) {
+        /* guest wants the rest of its previous transfer */
+        int remainder_len = MIN(io->remainder_len, io->len);
+
+        MACIO_DPRINTF("copying remainder %d bytes\n", remainder_len);
+
+        cpu_physical_memory_write(io->addr, io->remainder + 0x200 -
+                                  remainder_len, remainder_len);
+
+        io->addr += remainder_len;
+        io->len -= remainder_len;
+        s->io_buffer_size = remainder_len;
+        io->remainder_len -= remainder_len;
+        /* treat remainder as individual transfer, start again */
+        pmac_ide_atapi_transfer_cb(opaque, 0);
+        return;
+    }
+
+    if (!s->packet_transfer_size) {
         MACIO_DPRINTF("end of transfer\n");
         ide_atapi_cmd_ok(s);
         m->dma_active = false;
@@ -98,14 +122,40 @@ static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)
 
     /* launch next transfer */
 
-    MACIO_DPRINTF("io->len = %#x\n", io->len);
+    /* handle unaligned accesses first, get them over with and only do the
+       remaining bulk transfer using our async DMA helpers */
+    unaligned = io->len & 0x1ff;
+    if (unaligned) {
+        int sector_num = (s->lba << 2) + (s->io_buffer_index >> 9);
+        int nsector = io->len >> 9;
 
-    s->io_buffer_size = io->len;
+        MACIO_DPRINTF("precopying unaligned %d bytes to %#lx\n",
+                      unaligned, io->addr + io->len - unaligned);
+
+        bdrv_read(s->bs, sector_num + nsector, io->remainder, 1);
+        cpu_physical_memory_write(io->addr + io->len - unaligned,
+                                  io->remainder, unaligned);
+
+        io->len -= unaligned;
+    }
+
+    MACIO_DPRINTF("io->len = %#x\n", io->len);
 
     qemu_sglist_init(&s->sg, io->len / MACIO_PAGE_SIZE + 1,
                      &address_space_memory);
     qemu_sglist_add(&s->sg, io->addr, io->len);
-    io->addr += io->len;
+    io->addr += s->io_buffer_size;
+    io->remainder_len = MIN(s->packet_transfer_size - s->io_buffer_size,
+                            (0x200 - unaligned) & 0x1ff);
+    MACIO_DPRINTF("set remainder to: %d\n", io->remainder_len);
+
+    /* We would read no data from the block layer, thus not get a callback.
+       Just fake completion manually. */
+    if (!io->len) {
+        pmac_ide_atapi_transfer_cb(opaque, 0);
+        return;
+    }
+
     io->len = 0;
 
     MACIO_DPRINTF("sector_num=%d size=%d, cmd_cmd=%d\n",
@@ -128,14 +178,16 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
     DBDMA_io *io = opaque;
     MACIOIDEState *m = io->opaque;
     IDEState *s = idebus_active_if(&m->bus);
-    int n;
+    int n = 0;
     int64_t sector_num;
+    int unaligned;
 
     if (ret < 0) {
         MACIO_DPRINTF("DMA error\n");
         m->aiocb = NULL;
         qemu_sglist_destroy(&s->sg);
         ide_dma_error(s);
+        io->remainder_len = 0;
         goto done;
     }
 
@@ -158,7 +210,33 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
         s->nsector -= n;
     }
 
-    if (s->nsector == 0) {
+    MACIO_DPRINTF("remainder: %d io->len: %d nsector: %d sector_num: %ld\n",
+                  io->remainder_len, io->len, s->nsector, sector_num);
+    if (io->remainder_len && io->len) {
+        /* guest wants the rest of its previous transfer */
+        int remainder_len = MIN(io->remainder_len, io->len);
+        uint8_t *p = &io->remainder[0x200 - remainder_len];
+
+        MACIO_DPRINTF("copying remainder %d bytes at %#lx\n",
+                      remainder_len, io->addr);
+
+        switch (s->dma_cmd) {
+        case IDE_DMA_READ:
+            cpu_physical_memory_write(io->addr, p, remainder_len);
+            break;
+        case IDE_DMA_WRITE:
+            cpu_physical_memory_read(io->addr, p, remainder_len);
+            bdrv_write(s->bs, sector_num - 1, io->remainder, 1);
+            break;
+        case IDE_DMA_TRIM:
+            break;
+        }
+        io->addr += remainder_len;
+        io->len -= remainder_len;
+        io->remainder_len -= remainder_len;
+    }
+
+    if (s->nsector == 0 && !io->remainder_len) {
         MACIO_DPRINTF("end of transfer\n");
         s->status = READY_STAT | SEEK_STAT;
         ide_set_irq(s->bus);
@@ -175,12 +253,49 @@ static void pmac_ide_transfer_cb(void *opaque, int ret)
     s->io_buffer_index = 0;
     s->io_buffer_size = io->len;
 
+    /* handle unaligned accesses first, get them over with and only do the
+       remaining bulk transfer using our async DMA helpers */
+    unaligned = io->len & 0x1ff;
+    if (unaligned) {
+        int nsector = io->len >> 9;
+
+        MACIO_DPRINTF("precopying unaligned %d bytes to %#lx\n",
+                      unaligned, io->addr + io->len - unaligned);
+
+        switch (s->dma_cmd) {
+        case IDE_DMA_READ:
+            bdrv_read(s->bs, sector_num + nsector, io->remainder, 1);
+            cpu_physical_memory_write(io->addr + io->len - unaligned,
+                                      io->remainder, unaligned);
+            break;
+        case IDE_DMA_WRITE:
+            /* cache the contents in our io struct */
+            cpu_physical_memory_read(io->addr + io->len - unaligned,
+                                     io->remainder, unaligned);
+            break;
+        case IDE_DMA_TRIM:
+            break;
+        }
+
+        io->len -= unaligned;
+    }
+
     MACIO_DPRINTF("io->len = %#x\n", io->len);
 
     qemu_sglist_init(&s->sg, io->len / MACIO_PAGE_SIZE + 1,
                      &address_space_memory);
     qemu_sglist_add(&s->sg, io->addr, io->len);
-    io->addr += io->len;
+    io->addr += io->len + unaligned;
+    io->remainder_len = (0x200 - unaligned) & 0x1ff;
+    MACIO_DPRINTF("set remainder to: %d\n", io->remainder_len);
+
+    /* We would read no data from the block layer, thus not get a callback.
+       Just fake completion manually. */
+    if (!io->len) {
+        pmac_ide_transfer_cb(opaque, 0);
+        return;
+    }
+
     io->len = 0;
 
     MACIO_DPRINTF("sector_num=%" PRId64 " n=%d, nsector=%d, cmd_cmd=%d\n",
diff --git a/include/hw/ppc/mac_dbdma.h b/include/hw/ppc/mac_dbdma.h
index 4d7318d..90efd27 100644
--- a/include/hw/ppc/mac_dbdma.h
+++ b/include/hw/ppc/mac_dbdma.h
@@ -39,6 +39,9 @@ struct DBDMA_io {
     DBDMA_end dma_end;
     /* DMA is in progress, don't start another one */
     bool processing;
+    /* unaligned last sector of a request */
+    uint8_t remainder[0x200];
+    int remainder_len;
 };
 
 /*
