diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index d7df357029..5bb390773b 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -775,11 +775,12 @@ int scsi_disk_emulate_vpd_page(SCSIRequest *req, uint8_t *outbuf)
     }
     case 0xb1: /* block device characteristics */
     {
-        buflen = 8;
+        buflen = 0x40;
         outbuf[4] = (s->rotation_rate >> 8) & 0xff;
         outbuf[5] = s->rotation_rate & 0xff;
-        outbuf[6] = 0;
-        outbuf[7] = 0;
+        outbuf[6] = 0; /* PRODUCT TYPE */
+        outbuf[7] = 0; /* WABEREQ | WACEREQ | NOMINAL FORM FACTOR */
+        outbuf[8] = 0; /* VBULS */
         break;
     }
     case 0xb2: /* thin provisioning */