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-rw-r--r--sys/dev/ata/ata-raid.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/dev/ata/ata-raid.c b/sys/dev/ata/ata-raid.c
index d361e45..85123aa 100644
--- a/sys/dev/ata/ata-raid.c
+++ b/sys/dev/ata/ata-raid.c
@@ -428,7 +428,8 @@ ar_promise_conf(struct ad_softc *adp, struct ar_softc **raidp)
u_int32_t cksum, *ckptr;
int count, disk_number, array;
- lba = adp->total_secs - adp->sectors;
+ lba = ((adp->total_secs / (adp->heads * adp->sectors)) *
+ adp->heads * adp->sectors) - adp->sectors;
if (ar_read(adp, lba, 4 * DEV_BSIZE, (char *)&info)) {
if (bootverbose)
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