fix: connect disks pre-emptively during startup (#10669)

connect disks pre-emptively upon startup, to ensure we have
enough disks are connected at startup rather than wait
for them.

we need to do this to avoid long wait times for server to
be online when we have servers come up in rolling upgrade
fashion

cmd/storage-rest-client.go

@@ -121,9 +121,6 @@ type storageRESTClient struct {
 // permanently. The only way to restore the storage connection is at the xl-sets layer by xlsets.monitorAndConnectEndpoints()
 // after verifying format.json
 func (client *storageRESTClient) call(ctx context.Context, method string, values url.Values, body io.Reader, length int64) (io.ReadCloser, error) {
-	if !client.IsOnline() {
-		return nil, errDiskNotFound
-	}
 	if values == nil {
 		values = make(url.Values)
 	}
@@ -134,7 +131,6 @@ func (client *storageRESTClient) call(ctx context.Context, method string, values
 	}
 
 	err = toStorageErr(err)
-
 	return nil, err
 }